User Submitted Ratings for Castle Rock Tap Water
- Drinking Water Pollution and Inaccessibility 22% Low
- Water Pollution 39% Low
- Drinking Water Quality and Accessibility 78% High
- Water Quality 61% High
The above data is comprised of subjective, user submitted opinions about the water quality and pollution in Castle Rock, measured on a scale from 0% (lowest) to 100% (highest).
Table of Contents1) User Submitted Ratings for Castle Rock Tap Water2) Related FAQs3) Can You Drink Tap Water in Castle Rock?4) Water Quality Report for Castle Rock Tap Water5) Castle Rock Tap Water Safe Drinking Water Act Violation History - Prior 10 Years6) Is there Lead in Castle Rock Water?7) Are there PFAS in Castle Rock Tap Water?8) Castle Rock SDWA Violation History Table - Prior 10 Years9) What do these Violations Mean?10) Can You Drink Tap Water in Castle Rock?11) Contaminants12) Sources and Resources
Can You Drink Tap Water in Castle Rock?
Yes, Castle Rock's tap water is generally considered safe to drink as Castle Rock 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. For the latest updates on Castle Rock water, please check out its Twitter page
According the EPA’s ECHO database, from July 30, 2018 to Sept. 30, 2021, Castle Rock's water utility, CASTLE ROCK TOWN OF, had 1 non-health-based violations of the Safe Drinking Water Act. For more details on the violations, please see our violation history section below. The last violation for Castle Rock was resolved on May 31, 2019. This assessment is based on the CASTLE ROCK TOWN OF 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.
Water Quality Report for Castle Rock Tap Water
The most recent publicly available numbers for measured contaminant levels in Castle Rock 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 Castle Rock's water quality reports, or getting your home's tap water tested to see if you should be filtering your water.
Castle Rock Tap Water Safe Drinking Water Act Violation History - Prior 10 Years
Below is a ten year history of violations for the water system named CASTLE ROCK TOWN OF for Castle Rock in Colorado. For more details please see the "What do these Violations Mean?" section below.
From May 1, 2019 to May 31, 2019, Castle Rock 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 of Treatment (SWTR-Filter) which falls into the Microbials rule code group, and the Surface Water Treatment Rules rule code family for the following contaminant code: Surface Water Treatment Rule.
From Oct. 1, 2013 to Oct. 31, 2013, Castle Rock 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 of Treatment (SWTR-Filter) which falls into the Microbials rule code group, and the Surface Water Treatment Rules rule code family for the following contaminant code: Surface Water Treatment Rule.
From Sept. 1, 2013 to Sept. 30, 2013, Castle Rock 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 of Treatment (SWTR-Filter) which falls into the Microbials rule code group, and the Surface Water Treatment Rules rule code family for the following contaminant code: Surface Water Treatment Rule.
Is there Lead in Castle Rock Water?
Based on the EPA’s ECHO Database, 90% of the samples taken from the Castle Rock water system, CASTLE ROCK TOWN OF, between sample start date and sample end date, were at or below, 0.002 mg/L of lead in Castle Rock water. This is 13.3% of the 0.015 mg/L action level. This means 10% of the samples taken from Castle Rock contained more lead.
While Castle Rock water testing may have found 0.002 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 Castle Rock 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 - Air Force Plant PJKS - near Castle Rock 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 Castle Rock 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.
Castle Rock 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|
|05/01/2019 - 05/31/2019||Resolved||No||Monitoring and Reporting (MR)||Monitoring of Treatment (SWTR-Filter) (36)||Surface Water Treatment Rule (121)||Surface Water Treatment Rule (0200)||Microbials (100)||Surface Water Treatment Rules (120)|
|10/01/2013 - 10/31/2013||Resolved||No||Monitoring and Reporting (MR)||Monitoring of Treatment (SWTR-Filter) (36)||Surface Water Treatment Rule (121)||Surface Water Treatment Rule (0200)||Microbials (100)||Surface Water Treatment Rules (120)|
|09/01/2013 - 09/30/2013||Resolved||No||Monitoring and Reporting (MR)||Monitoring of Treatment (SWTR-Filter) (36)||Surface Water Treatment Rule (121)||Surface Water Treatment Rule (0200)||Microbials (100)||Surface Water Treatment Rules (120)|
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
- Maximum contaminant levels (MCLs) - maximum allowed contaminant level was exceeded.
- Maximum residual disinfectant levels (MRDLs) - maximum allowed disinfectant level was exceeded.
- Other violations (Other) - the exact required process to reduce the amounts of contaminants in drinking water was not followed.
Non-Health Based Violations
- 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.
- 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.
- Other violations (Other) - miscellaneous violations, such as failure to issue annual consumer confidence reports or maintain required records.
SDWA Table Key
|Compliance Period||Dates of the compliance period.|
Current status of the violation.
|Health-Based?||Whether the violation is health based.|
The category of violation that is reported.
|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.|
Code for a National Drinking Water rule.
|Rule Group Code||
Code that uniquely identifies a rule group.
|Rule Family Code||
Code for rule family.
For more clarification please visit the EPA's data dictionary.
Can You Drink Tap Water in Castle Rock?
We don't have enough information to make a specific recommendation about the safety of drinking tap water in Castle Rock, Colorado.
However, based on information from nearby locations, the average water score in Colorado is a out of 100.
Tap Safe includes data from many publicly available sources, including the WHO (World Health Organization), CDC (Center for Disease Control), and user submitted databases, but unfortunately there's not enough data about Castle Rock.
To see user submitted ratings of the water quality for Colorado, see the "User Submitted Ratings" box on this page.
EWG's drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group by the Colorado Department of Public Health & Environment, 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.
- Serves: 54826
- Data available: 2012-2017
- Data Source: Purchased groundwater under influence of surface water
- Total: 19
Contaminants That Exceed Guidelines
- Chromium (hexavalent)
- Radium%2C combined (-226 & -228)
- Total trihalomethanes (TTHMs)
Other Detected Contaminants
- Chromium (total)
- Dibromoacetic acid
- Dichloroacetic acid
- Haloacetic acids (HAA5)
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
Check tap water safety for other popular destinations
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- United States of America
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