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Is Clovis Tap Water Safe to Drink?

Yes! Generally Safe to Drink*

LAST UPDATED: 7:48 pm, July 17, 2022
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Table of Contents

Can You Drink Tap Water in Clovis?

Yes, Clovis's tap water is generally considered safe to drink as Clovis has no active health based violations of the Safe Drinking Water Act (SDWA) that we are aware of. Other factors such as lead piping in a home, or low levels of pollutants on immunocompromised individuals, should also be considered, however. To find more recent info we might have, you can check out our boil water notice page or the city's water provider website.

According the EPA’s ECHO database, from April 30, 2019 to June 30, 2022, Clovis's water utility, City of Clovis, had 0 violations of the Safe Drinking Water Act. For more details on the violations, please see our violation history section below. The last violation for Clovis was resolved on Aug. 31, 2013. This assessment is based on the City of Clovis water system, other water systems in the city may have different results.

While tap water that meets the EPA health guidelines generally won’t make you sick to your stomach, it can still contain regulated and unregulated contaminants present in trace amounts that could potentially cause health issues over the long-run. These trace contaminants may also impact immunocompromised and vulnerable individuals.

The EPA is reviewing if it’s current regulations around pollutant levels in tap water are strict enough, and the health dangers posed by unregulated pollutants, like PFAS.

Water Quality Report for Clovis Tap Water

The most recent publicly available numbers for measured contaminant levels in Clovis tap water are in its 2020 Water Quality Report. As you can see, there are levels which the EPA considers to be acceptable, but being below the maximum allowable level doesn’t necessarily mean the water is healthy.

Lead in tap water, for example, is currently allowed at up to 15ppb by the EPA, but it has set the ideal goal for lead at zero. This highlights how meeting EPA standards doesn’t necessarily mean local tap water is healthy.

EPA regulations continue to change as it evaluates the long term impacts of chemicals and updates drinking water acceptable levels. The rules around arsenic, as well as, lead and copper are currently being re-evaluated.

There are also a number of "emerging" contaminants that are not currently. For example, PFAS (Per- and polyfluoroalkyl substances), for which the EPA has issued a health advisory. PFAS are called "forever chemicals" since they tend not to break down in the environment or the human body and can accumulate over time.

We recommend looking at the contaminants present in Clovis's water quality reports, or getting your home's tap water tested to see if you should be filtering your water.

Clovis Tap Water Safe Drinking Water Act Violation History - Prior 10 Years

Below is a ten year history of violations for the water system named City of Clovis for Clovis in California. For more details please see the "What do these Violations Mean?" section below.

From Aug. 1, 2013 to Aug. 31, 2013, Clovis had 1 non-health based Safe Drinking Water Act violation with the violation category being Monitoring and Reporting, more specifically, the violation code was Monitoring, Repeat Major (TCR) which falls into the Microbials rule code group, and the Total Coliform Rules rule code family for the following contaminant code: Coliform (TCR).

Is there Lead in Clovis Water?

Based on the EPA’s ECHO Database, 90% of the samples taken from the Clovis water system, City of Clovis, between sample start date and sample end date, were at or below, 0.0 mg/L of lead in Clovis water. This is 0% of the 0.015 mg/L action level. This means 10% of the samples taken from Clovis contained more lead.

While Clovis water testing may have found 0.0 mg/L of lead in its water, that does not mean your water source has the same amount. The amount of lead in water in a city can vary greatly from neighborhood to neighborhood, or even building to building. Many buildings, particularly older ones, have lead pipes or service lines which can be a source of contamination. To find out if your home has lead, we recommend getting you water tested.

No amount of lead in water is healthy, only less dangerous. As lead accumulates in our bodies over time, even exposure to relatively small amounts can have negative health effects. For more information, please check out our Lead FAQ page.

Are there PFAS in Clovis Tap Water?

Currently, testing tap water for PFAS isn’t mandated on a national level. We do have a list of military bases where there have been suspected or confirmed leaks. There appears to be at least one military base - Fresno Air Guard/Fresno TASMG - near Clovis with suspected leaks.

With many potential sources of PFAS in tap water across the US, the best information we currently have about which cities have PFAS in their water is this ewg map, which you can check to see if Clovis has been evaluated for yet.

Our stance is better safe than sorry, and that it makes sense to try to purify the tap water just in case.

Clovis SDWA Violation History Table - Prior 10 Years

Compliance Period Status Health-Based? Category Code Code Rule Code Contaminant Code Rule Group Code Rule Family Code
08/01/2013 - 08/31/2013 Resolved No Monitoring and Reporting (MR) Monitoring, Repeat Major (TCR) (25) Total Coliform Rule (110) Coliform (TCR) (3100) Microbials (100) Total Coliform Rules (110)

What do these Violations Mean?

Safe Drinking Water Act Violations categories split into two groups, health based, and non-health based. Generally, health based violations are more serious, though non-health based violations can also be cause for concern.

Health Based Violations

  1. Maximum contaminant levels (MCLs) - maximum allowed contaminant level was exceeded.
  2. Maximum residual disinfectant levels (MRDLs) - maximum allowed disinfectant level was exceeded.
  3. Other violations (Other) - the exact required process to reduce the amounts of contaminants in drinking water was not followed.

Non-Health Based Violations

  1. Monitoring and reporting violations (MR, MON) - failure to conduct the required regular monitoring of drinking water quality, and/or to submit monitoring results on time.
  2. Public notice violations (Other) - failure to immediately alert consumers if there is a serious problem with their drinking water that may pose a risk to public health.
  3. Other violations (Other) - miscellaneous violations, such as failure to issue annual consumer confidence reports or maintain required records.

SDWA Table Key

Field Description
Compliance Period Dates of the compliance period.
Status Current status of the violation.
  • Resolved - The violation has at least one resolving enforcement action. In SDWIS, this indicates that either the system has returned to compliance from the violation, the rule that was violated was no longer applicable, or no further action was needed.
  • Archived - The violation is not Resolved, but is more than five years past its compliance period end date. In keeping with the Enforcement Response Policy, the violation no longer contributes to the public water system's overall compliance status. Unresolved violations are also marked as Archived when a system ceases operations (becomes inactive).
  • Addressed - The violation is not Resolved or Archived, and is addressed by one or more formal enforcement actions.
  • Unaddressed - The violation is not Resolved or Archived, and has not been addressed by formal enforcement.
show details
Health-Based? Whether the violation is health based.
Category Code
The category of violation that is reported.
  • TT - Treatment Technique Violation
  • MRDL - Maximum Residual Disinfectant Level
  • Other - Other Violation
  • MCL - Maximum Contaminant Level Violation
  • MR - Monitoring and Reporting
  • MON - Monitoring Violation
  • RPT - Reporting Violation
show details
Code A full description of violation codes can be accessed in the SDWA_REF_CODE_VALUES (CSV) table.
Contaminant Code A code value that represents a contaminant for which a public water system has incurred a violation of a primary drinking water regulation.
Rule Code Code for a National Drinking Water rule.
  • 110 - Total Coliform Rule
  • 121 - Surface Water Treatment Rule
  • 122 - Long Term 1 Enhanced Surface Water Treatment Rule
  • 123 - Long Term 2 Enhanced Surface Water Treatment Rule
  • 130 - Filter Backwash Rule
  • 140 - Ground Water Rule
  • 210 - Stage 1 Disinfectants and Disinfection Byproducts Rule
  • 220 - Stage 2 Disinfectants and Disinfection Byproducts Rule
  • 230 - Total Trihalomethanes
  • 310 - Volatile Organic Chemicals
  • 331 - Nitrates
  • 332 - Arsenic
  • 333 - Inorganic Chemicals
  • 320 - Synthetic Organic Chemicals
  • 340 - Radionuclides
  • 350 - Lead and Copper Rule
  • 410 - Public Notice Rule
  • 420 - Consumer Confidence Rule
  • 430 - Miscellaneous
  • 500 - Not Regulated
  • 111 - Revised Total Coliform Rule
show details
Rule Group Code Code that uniquely identifies a rule group.
  • 120 - Surface Water Treatment Rules
  • 130 - Filter Backwash Rule
  • 140 - Groundwater Rule
  • 210 - Stage 1 Disinfectants and Disinfection Byproducts Rule
  • 220 - Stage 2 Disinfectants and Disinfection Byproducts Rule
  • 230 - Total Trihalomethanes
  • 310 - Volatile Organic Chemicals
  • 320 - Synthetic Organic Chemicals
  • 330 - Inorganic Chemicals
  • 340 - Radionuclides
  • 350 - Lead and Copper Rule
  • 400 - Other
  • 500 - Not Regulated
  • 110 - Total Coliform Rules
  • 410 - Public Notice Rule
  • 420 - Consumer Confidence Rule
  • 430 - Miscellaneous
show details
Rule Family Code Code for rule family.
  • 100 - Microbials
  • 200 - Disinfectants and Disinfection Byproducts Rule
  • 300 - Chemicals
  • 400 - Other
  • 500 - Not Regulated
show details

For more clarification please visit the EPA's data dictionary.

Clovis Water - Frequently Asked Questions

WHERE DOES MY WATER COME FROM?
The City of Clovis supplies water to the City of Clovis and the Tarpey Village unincorporated area of Fresno County. The water supplied comes from the Kings River via the Enterprise Canal and 36 groundwater wells. Of these wells, six have wellhead treatment to provide for the removal of DBCP and/or TCP, and one to remove iron and manganese.
HOW DO I CONTACT CLOVIS CUSTOMER SERVICE?
To contact customer service for the Clovis water provider, City of Clovis, please use the information below.
By Phone: 559-324-2649
By Email: paula@cityofclovis.com
By Mail: 155 N. SUNNYSIDE AVE.
CLOVIS, CA, 93611
HOW TO PAY BILL FOR CITY OF CLOVIS
Already have an account?

Existing customers can login to their City of Clovis account to pay their Clovis water bill by clicking here.

Want to create a new account?

If you want to pay your City of Clovis bill online and haven't made an account yet, you can create an account online. Please click here to create your account to pay your Clovis water bill.

Want to pay without an account?

If you don't want to make an account, or can't remember your account, you can make a one-time payment towards your Clovis water bill without creating an account using a one time payment portal with your account number and credit or debit card. Click here to make a one time payment.

HOW TO START & STOP CLOVIS WATER SERVICE
Starting Your Service

Moving to a new house or apartment in Clovis means you will often need to put the water in your name with City of Clovis. In order to put the water in your name, please click the link to the start service form below. Start service requests for water bills typically take two business days.

Start Service Form

Want to create a new account?

Leaving your house or apartment in Clovis means you will likely need to take your name off of the water bill with City of Clovis. In order to take your name off the water bill, please click the link to the stop service form below. Stop service for water bills requests typically take two business days.

Stop Service Form

USER SUBMITTED RATINGS

Clovis tap water
  • Drinking Water Pollution and Inaccessibility 30% Low
  • Water Pollution 40% Moderate
  • Drinking Water Quality and Accessibility 70% High
  • Water Quality 60% High

The above data is comprised of subjective, user submitted opinions about the water quality and pollution in Clovis, measured on a scale from 0% (lowest) to 100% (highest).

Related FAQS

Clovis Water Quality Report (Consumer Confidence Report)

The EPA mandates that towns and cities consistently monitor and test their tap water. They must report their findings in an annual Consumer Confidence Report. Below is the most recent water quality report from Clovis's Water. If you would like to see the original version of the report, please click here.

annualWATER

Quality

REPORT

REPORTING YEAR 2020

Presented By

City of Clovis Water Division

Este informe contiene información muy importante sobre su agua potable. Tradúzcalo o hable con alguien que lo entienda bien.

Daimntawv tshaj tawm no muaj lus tseemceeb txog koj cov dej haus. Tshab txhais nws, los yog tham nrog tej tug neeg uas totaub txog nws.

PWS ID#: CA1010003

We remain vigilant in
delivering the best-quality
drinking water

Quality First

Once again, we are pleased to present our annual water quality report covering all testing performed between January 1 and December 31, 2020. As part of the City of Clovis’ ongoing mission to provide clean and refreshing water to all of its customers, the City samples the water it supplies for over 150 different contaminants. In this report, you will find listings of

contaminants which were detected and information about those contaminants. The City’s primary concern regarding water is the quality of the water supplied to its customers. To that end, we remain vigilant in meeting the challenges of new regulations, source water protection, water conservation, and community outreach and education, while continuing to serve the needs of all our water users. Thank you for allowing us the opportunity to serve you and your family.

Water Conservation

Please visit the City of Clovis website for current information on allowed watering days and conservation requirements. For customers who wish to replace their existing 5- to 7-gallon-per-flush toilets with ultra-low flow (1.28 gallon) models, rebates up to $75 are available with advance approval from the City. The City also has low-flow showerheads and faucet aerators available at no charge. High-efficiency washing machine rebates of $35 to $50 per qualified machine purchased and installed are also available. Call (559) 324-2600 or visit www.cityofclovis. com for information on rebates, water use audits, and

fixture replacements.

Lead in Home Plumbing

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and

young children. Lead in drinking water is primarily from materials and

components associated with service lines and home plumbing. We are responsible for providing high-quality drinking water, but we cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. (If you do so, you may wish to collect the flushed water and reuse it for another beneficial purpose, such as watering plants.) If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline at (800) 426-4791 or at www.epa.gov/safewater/lead.

Source Water Assessment

An assessment of drinking water sources for the City of Clovis was completed in 2003 by the State Board and in 2006, 2009, and 2015 by the City of Clovis. The sources are considered most vulnerable to the following activities associated with contaminants detected in the water supply: known contaminant plumes, fertilizer, and pesticide/herbicide application. In addition, the sources are considered most vulnerable to these activities: automobile (gas stations), metal plating/finishing/ fabrication, historic waste dumps/landfills, boat services/ repair/refinishing, sewer collection systems, chemical/ petroleum processing/storage, dry cleaners, automobile (body shops), automobile repair shops, fleet/truck/bus terminals, junk/scrap/ salvage yards, machine shops, photo processing/printing, plastics/synthetics producers, underground storage tanks (confirmed leaking), and septic systems.

An assessment of the Enterprise Canal was completed by the City in 2018. The source is most vulnerable to

chemical or fuel storage tanks. A copy of the complete assessment is available at 155 N. Sunnyside Avenue. You may request a summary of the assessment be sent to you by contacting Public Utilities at (559) 324-2600.

Where Does My Water Come From?

The City of Clovis supplies water to the City of Clovis and the Tarpey Village unincorporated area of Fresno County. The water supplied comes from the Kings River via the Enterprise Canal and 36 groundwater wells. Of these wells, six have wellhead treatment to provide for the removal of DBCP and/or TCP, and one to remove iron and

manganese.

Water Service Maintenance

The City owns and maintains water services up to and including the water meter. The portion of the service line behind the meter and up to the house is the customer’s responsibility to maintain. If you have a leak behind the meter or need the water shut off for any reason, please contact the City of Clovis Public Utilities Department at

(559) 324-2600 to turn off the water.

Community Participation

The Clovis City Council regularly meets on the first, second, and third Mondays of the month at 6:00 p.m. at the Clovis City Council Chamber, located at 1033 Fifth Street. We invite you to attend and participate

in these meetings.

Substances That Could Be in Water

The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the

presence of animals or from human activity.

In order to ensure that tap water is safe to drink, the U.S. Environmental Protection Agency (U.S. EPA) and the State Water Resources Control Board (State Board) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. The U.S. Food and Drug Administration regulations and California law also establish limits for contaminants in bottled water that provide the same protection for public health. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk.

Contaminants that may be present in source water include: Microbial Contaminants, such as viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife; Inorganic Contaminants, such as salts and metals, that can be naturally occurring or can result from urban storm-water runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming; Pesticides and Herbicides, that may come from a variety of sources such as agriculture, urban storm-water runoff, and residential uses; Organic Chemical Contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and which can also come from gas stations, urban storm-water runoff, agricultural applications, and septic systems; Radioactive Contaminants, that can be naturally occurring or can be the result of oil and gas production and mining activities.

More information about

contaminants and potential health effects can be obtained by calling the U.S. EPA’s Safe Drinking Water Hotline at (800)

426-4791.

Testing for Cryptosporidium

Cryptosporidium is a microbial pathogen found in surface water throughout the U.S. Although filtration removes cryptosporidium, the most commonly used filtration methods cannot guarantee 100 percent removal. The City of Clovis Surface Water Treatment Plant has a micro filtration process that removes 99.99%. Our monitoring indicates the presence of these organisms in the source water for the SWTP. Current test methods do not allow us to determine if the organisms are dead or if they are capable of causing disease. Ingestion of Cryptosporidium may cause cryptosporidiosis, an abdominal infection. Symptoms of infection include nausea, diarrhea, and abdominal cramps. Most healthy individuals can overcome the disease within a few weeks. However, immunocompromised people, infants and small children, and the elderly are at greater risk of developing life-threatening illness. We encourage immunocompromised individuals to consult their doctor regarding appropriate precautions to take to avoid infection. Cryptosporidium must be ingested to cause disease, and it

may be spread through means other than drinking water.

Important Health Information

Some people may be more vulnerable to contaminants in drinking water than the general population.

Immunocompromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants may be particularly at risk from infections. These people should seek advice about drinking water from their health-care providers. The U.S. EPA/ CDC (Centers for Disease Control and Prevention) guidelines on appropriate

means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline at (800)

426-4791 or http://water.epa.gov/ drink/hotline.

Questions? For more information about this report, or for any questions related to your drinking water, please call the

Public Utilities Department at (559) 324-2600.

Test Results

The following table lists all of the drinking water contaminants that were detected during 2020. The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. Unless otherwise noted, the data presented in this table are from testing done January 1 to December 31, 2020. The State requires monitoring for certain contaminants less than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. Therefore, some of the data shown in the table, though representative of the

water quality, are more than one year old.

We participated in the 4th stage of the U.S. EPA’s Unregulated Contaminant Monitoring Rule (UCMR4) program by performing additional tests on our drinking water. UCMR4 sampling benefits the environment and public health by providing the U.S. EPA with data on the occurrence of contaminants suspected to be in drinking water, in order to determine if U.S. EPA needs to introduce new regulatory standards to improve drinking water quality. Unregulated contaminant monitoring data are available to the public, so please feel free to contact us if you are interested in obtaining that information. If you would like more information on the U.S. EPA’s Unregulated Contaminants Monitoring Rule, please call the Safe Drinking Water Hotline at (800) 426-4791.

REGULATED SUBSTANCES

 

 

 

PHG

 

 

 

SUBSTANCE

YEAR

MCL

(MCLG)

AVERAGE

RANGE

IN

(UNIT OF MEASURE)

SAMPLED

[MRDL]

[MRDLG]

DETECTED

LOW-HIGH

COMPLIANCE TYPICAL SOURCE

Arsenic (ppb)

2020

Barium (ppm)

2020

Chlorine (ppm)

2020

Dibromochloropropane [DBCP-

2020

Treated] (ppt)

 

Fluoride (ppm)

2020

Gross Alpha Particle Activity (pCi/L)

2020

Haloacetic Acids (ppb)

2020

Hexavalent Chromium1 (ppb)

2015

Nitrate [as nitrogen]2 (ppm)

2020

Radium 228 (pCi/L)

2015

TTHMs [Total Trihalomethanes] (ppb)

2020

Total Coliform Bacteria [state Total

2020

Coliform Rule] (% positive samples)

 

Trichloropropane

2020

[1,2,3-TCP]6 (ppb)

 

SURFACE WATER

 

10

1

[4.0 (as Cl2)]

200

2.0

15

60

NS

10

5

80

5.0% of

monthly samples

are positive

0.005

0.004

2

[4 (as Cl2)]

1.7

1

(0)

NA

0.02

10

0.019

NA

(0)

0.0007

0.27

0.01902

1.26

10.6

0.07

0

21.0

0

1.62

0

46.0

3

0

0–3.9

0–0.16

0.10–2.09

0–170

0–0.21

0.30–4.23

0.31–30

0–2.2

0–10

0–1.51

12–70

NA

0–0.006

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Erosion of natural deposits; runoff from orchards; glass and electronics production wastes

Discharges of oil drilling wastes and from metal refineries; erosion of natural deposits

Drinking water disinfectant added for treatment

Banned nematocide that may still be present in soils due to runoff/leaching from former use on soybeans, cotton, vineyards, tomatoes, and tree fruit

Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum factories; Clovis does not fluoridate.

Erosion of natural deposits By-product of drinking water disinfection

Discharge from electroplating factories, leather tanneries, wood preservation, chemical synthesis, refractory production, and textile manufacturing facilities; erosion of natural deposits

Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits

Erosion of natural deposits By-product of drinking water disinfection Naturally present in the environment

By-product during the production of other compunds and pesticides

SUBSTANCE

YEAR

(UNIT OF MEASURE)

SAMPLED

MCL

PHG (MCLG)

AVERAGE

RANGE

[MRDL]

[MRDLG]

DETECTED

LOW-HIGH

IN

COMPLIANCE TYPICAL SOURCE

Turbidity (NTU)

2020

TT

NA

0.059

0.024–0.059

Turbidity (lowest monthly percent of

2020

TT = 95% of samples

NA

100%

NA

samples meeting limit)

 

meet the limit

 

 

 

Yes

Soil runoff

Yes

Soil runoff

 

 

Tap Water Samples Collected for Copper and Lead Analyses from Sample Sites throughout the Community

SUBSTANCE

 

 

AVERAGE

SITES

 

(UNIT OF

YEAR

PHG

DETECTED

ABOVE AL/

IN

MEASURE)

SAMPLED AL

(MCLG)

(90TH %ILE)

TOTAL SITES

COMPLIANCE TYPICAL SOURCE

Copper (ppm)

2018

1.3

Lead (ppb)

2018

15

 

 

 

SECONDARY SUBSTANCES

0.3

0.2

0.25

0

0/53

0/53

Yes

Yes

Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives

Internal corrosion of household water plumbing systems; discharge from industrial manufacturers; erosion of natural deposits

SUBSTANCE

YEAR

(UNIT OF MEASURE)

SAMPLED SMCL

PHG

AVERAGE

(MCLG)

DETECTED

RANGE

LOW-HIGH

IN

COMPLIANCE TYPICAL SOURCE

Chloride (ppm)

Color (Units)

Manganese (ppb)

Specific Conductance (µmho/cm)

Sulfate (ppm)

Total Dissolved Solids (ppm)

Turbidity (NTU)

2020

2020

2020

2020

2020

2020

2020

500

15

50

1,600

500

1,000

5

NS

4.9

NS

0

NS

0.22

NS

175

NS

5.8

NS

127

NS

0.25

 

 

2.4–16

0–0

0–84

43–510

1.2–37

28–340

0.10–0.98

Yes

Runoff/leaching from natural deposits; seawater influence

Yes

Naturally occurring organic materials

Yes

Leaching from natural deposits

Yes

Substances that form ions when in water; seawater influence

Yes

Runoff/leaching from natural deposits; industrial wastes

Yes

Runoff/leaching from natural deposits

Yes

Soil runoff

 

 

UNREGULATED AND OTHER SUBSTANCES 3

SUBSTANCE

(UNIT OF MEASURE)

Bromochloroacetic Acid (ppb) Bromodichloroacetic Acid (ppb) Chlorodibromoacetic Acid (ppb) Hardness, Total [as CaCO3] (ppm)

Perfluorooctanesulfonate Acid (PFOS)4,6 (ppt)

Perfluorooctanoic Acid (PFOA)5,6 (ppt)

Sodium (ppm)

Total Organic Carbon [TOC] (ppb)

YEAR

AVERAGE

SAMPLED

DETECTED

2020

 

0.76

2020

0.70

2020

0.41

2020

65.8

2020

4.22

2020

2.26

2020

10.8

2020

1800

RANGE

LOW-HIGH

0.54–1.70

0.52–0.90

0.35–0.46

11–210

0–18

0–10

3.2–60

1200–2400

TYPICAL SOURCE

By-product of drinking water disinfection By-product of drinking water disinfection By-product of drinking water disinfection

Hardness is the sum of polyvalent cations present in the water, generally magnesium and calcium. The cations are usually naturally occurring

Manmade compounds used in firefighting foams, to make consumer products, and in industrial processes.

Manmade compounds used in firefighting foams, to make consumer products, and in industrial processes.

Sodium refers to the salt present in the water and is generally naturally occurring Naturally occurring

  1. There is currently no maximum contaminant level (MCL) for hexavalent chromium. The previous MCL of 0.010 mg/L was withdrawn on September 11, 2017. Some people who drink water containing hexavalent chromium in excess of 0.010 mg/L over many years may have an increased risk of getting cancer.
  2. Nitrate in drinking water at levels above 10 mg/L is a health risk for infants of less than six months of age. Such nitrate levels in drinking water can interfere with the capacity of the infant’s blood to carry oxygen, resulting in a serious illness; symptoms include shortness of breath and blueness of the skin. Nitrate levels above 10 mg/L may also affect the ability of the blood to carry oxygen in other individuals, such as pregnant women and those with certain specific enzyme deficiencies. If you are caring for an infant or you are pregnant, you should seek advice from your health-care provider.
  3. Unregulated contaminant monitoring helps U.S. EPA and the State Water Resources Control Board to determine where certain contaminants occur and whether the contaminants need to be regulated.
  1. During the year, three well sites (42, T-5, and T-6) had PFOS test results that were above the Notification Level (NL) of 6.5 ppt but were below the Response Level (RL) of 40 ppt.
  2. During the year, one well site (T-5) had PFOA test results that was above the NL of 5.1 ppt and was at the Response Level (RL) of 10 ppt and has since been taken offline.
  3. Part of a larger group of chemicals referred to as per- and poly-fuoroalkyl substances (PFAS). Studies indicate that long-term exposure to PFOS and PFOA over certain levels could have adverse health effects. Potential health impacts related to PFAS compounds are still being studied, and research is still evolving on this issue. Although there is no Maximum Contaminant Level (MCL) set for these substances, we have proactively monitored sources and will continue to do so.

Definitions

90th %ile: The levels reported for lead and copper represent the 90th percentile of the total number of sites tested. The 90th percentile is equal to or greater than 90% of our lead and copper detections.

AL (Regulatory Action Level): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.

MCL (Maximum Contaminant Level): The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs (SMCLs) are set to protect the odor, taste and appearance of drinking water.

MCLG (Maximum Contaminant Level Goal): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. EPA.

MRDL (Maximum Residual Disinfectant Level): The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

MRDLG (Maximum Residual Disinfectant Level Goal): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

NA: Not applicable.

ND (Not detected): Indicates that the substance was not found by laboratory analysis.

NL (Notification Level): Established health-based advisory levels.

NS: No standard

NTU (Nephelometric Turbidity Units): Measurement of the clarity, or turbidity, of water. Turbidity in excess of 5 NTU is just noticeable to the average person.

pCi/L (picocuries per liter): A measure of radioactivity.

PDWS (Primary Drinking Water Standard): MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements.

PHG (Public Health Goal): The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California EPA.

ppb (parts per billion): One part substance per billion parts water (or micrograms per liter).

ppm (parts per million): One part substance per million parts water (or milligrams per liter).

ppt (parts per trillion): One part substance per trillion parts water (or nanograms per liter).

RL (Response Level): Level at which recommendation occurs.

  1. (Treatment Technique): A required process intended to reduce the level of a contaminant in drinking water.

µmho/cm (micromhos per centimeter): A unit expressing the amount of electrical conductivity of a solution.

Contaminants


City of Clovis

EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the California State Water Resources Control Board, as well as information from the U.S. EPA Enforcement and Compliance History database (ECHO). For the latest quarter assessed by the U.S. EPA (January 2019 - March 2019), tap water provided by this water utility was in compliance with federal health-based drinking water standards.

Utility details

  • Serves: 103871
  • Data available: 2012-2017
  • Data Source: Surface water
  • Total: 26

Contaminants That Exceed Guidelines

  • 1%2C2-Dibromo-3-chloropropane (DBCP)
  • Arsenic
  • Bromodichloromethane
  • Chloroform
  • Chromium (hexavalent)
  • Dibromochloromethane
  • Dichloroacetic acid
  • Nitrate
  • Nitrate and nitrite
  • Total trihalomethanes (TTHMs)
  • Trichloroacetic acid

Other Detected Contaminants

  • 1%2C2%2C3-Trichloropropane
  • Aluminum
  • Barium
  • Bromoform
  • Chlorate
  • Chromium (total)
  • Dibromoacetic acid
  • Fluoride
  • Haloacetic acids (HAA5)
  • Manganese
  • Molybdenum
  • Monochloroacetic acid
  • Strontium
  • tert-Butyl alcohol
  • Vanadium

Reminder

Always take extra precautions, the water may be safe to drink when it leaves the sewage treatment plant but it may pick up pollutants during its way to your tap. We advise that you ask locals or hotel staff about the water quality. Also, note that different cities have different water mineral contents.

Sources and Resources

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