Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CO0118010
PWS Name	CASTLE ROCK TOWN OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	106822
County Served	Douglas

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	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.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3005700	Returned to Compliance	01-JUN-2025	30-JUN-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3005699	Returned to Compliance	01-MAY-2025	31-MAY-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	3005687	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	3005683	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	3005688	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	3005686	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	3005685	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	3005684	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3005549	Returned to Compliance	01-MAY-2019	31-MAY-2019	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3005513	Returned to Compliance	01-OCT-2013	31-OCT-2013	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3005511	Returned to Compliance	01-SEP-2013	30-SEP-2013	No
MR	Monitoring, Regular	Nitrate Rule	Nitrite	3005508	Returned to Compliance	01-APR-2008	30-JUN-2008	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	3005507	Returned to Compliance	01-JUL-2007	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	3004907	Returned to Compliance	01-AUG-2006	31-AUG-2006	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	3005307	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	3005207	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	3005007	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	3005107	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	3002399	Returned to Compliance	01-JUN-1999	30-JUN-1999	No

1 - 19 of 19

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
3030843	3005699	SOX	State Compliance achieved	07-AUG-2025	State	-
3030843	3005700	SOX	State Compliance achieved	07-AUG-2025	State	-
3030836	3005687	SOX	State Compliance achieved	10-AUG-2023	State	System had lab upload results on 8/10/2022 lmf 12/5/2023
3030836	3005688	SOX	State Compliance achieved	10-AUG-2023	State	System had lab upload results on 8/10/2022 lmf 12/5/2023
3030836	3005686	SOX	State Compliance achieved	10-AUG-2023	State	System had lab upload results on 8/10/2022 lmf 12/5/2023
3030836	3005685	SOX	State Compliance achieved	10-AUG-2023	State	System had lab upload results on 8/10/2022 lmf 12/5/2023
3030836	3005684	SOX	State Compliance achieved	10-AUG-2023	State	System had lab upload results on 8/10/2022 lmf 12/5/2023
3030836	3005683	SOX	State Compliance achieved	10-AUG-2023	State	System had lab upload results on 8/10/2022 lmf 12/5/2023
3030822	3005549	SIE	State Public Notification requested	21-OCT-2019	State	-
3030820	3005511	SOX	State Compliance achieved	05-OCT-2016	State	-
3030820	3005513	SOX	State Compliance achieved	05-OCT-2016	State	-
3030811	3005508	SOX	State Compliance achieved	26-AUG-2008	State	rtc data received. js 8/26/08
3030808	3004907	SOX	State Compliance achieved	04-APR-2008	State	>6 mo wo violations. SOXd. aj
3030808	3002399	SOX	State Compliance achieved	04-APR-2008	State	>6 mo wo violations. SOXd. aj
3030807	3005507	SOX	State Compliance achieved	13-AUG-2007	State	-
3030607	3005307	SOX	State Compliance achieved	27-FEB-2007	State	Recd late.
3030607	3005207	SOX	State Compliance achieved	27-FEB-2007	State	Recd late.
3030607	3005107	SOX	State Compliance achieved	27-FEB-2007	State	Recd late.
3030607	3005007	SOX	State Compliance achieved	27-FEB-2007	State	Recd late.

1 - 19 of 19

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
PURCHASED THE PINERY WSD CO0118025	22505	Yes	Consecutive Connection	Ground water	Emergency	Active
WELL CR10	1916	Yes	Well	Ground water	Seasonal	Inactive
WELL 117	20005	Yes	Well	Ground water	Permanent	Inactive
WELL EXTRA FAIRGROUNDS NO 3	1942	Yes	Well	Ground water	Permanent	Inactive
WELL SECOND FAIRGROUNDS NO 2	1941	Yes	Well	Ground water	Permanent	Inactive
WELL 33 ENDERUD DEN1	1929	Yes	Well	Ground water	Permanent	Inactive
WELL 32 ENDERUD LDA	1928	Yes	Well	Ground water	Permanent	Inactive
WELL 31 ENDERUD A1	1927	Yes	Well	Ground water	Permanent	Inactive
WELL 28 MEADOWS A2	1926	Yes	Well	Ground water	Permanent	Inactive
WELL CR27	1925	Yes	Well	Ground water	Permanent	Inactive
WELL CR16 EDI DA1	1920	Yes	Well	Ground water	Permanent	Inactive
WELL CR15 EDI DEN1	1919	Yes	Well	Ground water	Permanent	Inactive
WELL 14 EDI A1	1918	Yes	Well	Ground water	Permanent	Inactive
WELL ROCK STREET WELL 9	1915	Yes	Well	Ground water	Permanent	Inactive
WELL 176 IRRIGATION ONLY	15023	Yes	Well	Ground water	Permanent	Inactive
WELL CR216	15017	Yes	Well	Ground water	Permanent	Inactive
WELL CR49 DUPLICATE	14800	Yes	Well	Ground water	Permanent	Inactive
WELL CR50 MEADOWS D5	14798	Yes	Well	Ground water	Permanent	Inactive
WELL 12R MILLER NO 2	1917	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
WELL CR-236	25913	Yes	Well	Ground water	Permanent	Active
WELL CR-235	25912	Yes	Well	Ground water	Permanent	Active
WELL CR-234	25911	Yes	Well	Ground water	Permanent	Active
CR-233	24172	Yes	Well	Ground water	Permanent	Active
CR-232	24171	Yes	Well	Ground water	Permanent	Active
WELL 176	23833	Yes	Well	Ground water	Permanent	Active
WELL CR-231	23708	Yes	Well	Ground water	Permanent	Active
WELL 27R	23303	Yes	Well	Ground water	Permanent	Active
WELL CR-230	23110	Yes	Well	Ground water	Permanent	Active
WELL CR-229	23109	Yes	Well	Ground water	Permanent	Active
WELL CR-228	23108	Yes	Well	Ground water	Permanent	Active
WELL CR-227	22886	Yes	Well	Ground water	Permanent	Active
WELL 16R	22650	Yes	Well	Ground water	Permanent	Active
WELL 15R	22649	Yes	Well	Ground water	Permanent	Active
WELL CR-226	22582	Yes	Well	Ground water	Permanent	Active
WELL CR-117	19970	Yes	Well	Ground water	Permanent	Active
WELL CR-101	19969	Yes	Well	Ground water	Permanent	Active
WELL 150	1940	Yes	Well	Ground water	Permanent	Active
WELL 149	1939	Yes	Well	Ground water	Permanent	Active
WELL 39	1938	Yes	Well	Ground water	Permanent	Active
WELL 49	1934	Yes	Well	Ground water	Permanent	Active
WELL CR-47	1933	Yes	Well	Ground water	Permanent	Active
WELL 45	1932	Yes	Well	Ground water	Permanent	Active
WELL 44	1931	Yes	Well	Ground water	Permanent	Active
WELL 43	1930	Yes	Well	Ground water	Permanent	Active
WELL CR-20	1923	Yes	Well	Ground water	Permanent	Active
WELL 22	1922	Yes	Well	Ground water	Permanent	Active
WELL CR-21	1921	Yes	Well	Ground water	Permanent	Active
WELL CR-152	18095	Yes	Well	Ground water	Permanent	Active
WELL CR-84	18094	Yes	Well	Ground water	Permanent	Active
WELL CR-67	18093	Yes	Well	Ground water	Permanent	Active

1 - 50 of 141

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TEMP WTP FOR 044 AND 045	13903	Sequestration	Corrosion control
RAY WATERMAN WTP	13904	Filtration, Rapid Sand	Particulate removal
RAY WATERMAN WTP	13904	Hypochlorination, Post	Disinfection
RAY WATERMAN WTP	13904	Chloramines	Disinfection
RAY WATERMAN WTP	13904	Innovative	Disinfection
PLUM CREEK WATER PURIFICATION FACILITY	20638	Activated Carbon, Granular	Organics removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Filtration, Rapid Sand	Particulate removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Ozonation, Post	Disinfection
PLUM CREEK WATER PURIFICATION FACILITY	20638	Peroxide	Organics removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Ultraviolet Radiation	Disinfection
PLUM CREEK WATER PURIFICATION FACILITY	20638	Innovative	Particulate removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Hypochlorination, Post	Disinfection
PLUM CREEK WATER PURIFICATION FACILITY	20638	Permanganate	Organics removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Permanganate	Taste / odor control
PLUM CREEK WATER PURIFICATION FACILITY	20638	Coagulation	Particulate removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Flocculation	Particulate removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Innovative	Disinfection
PLUM CREEK WATER PURIFICATION FACILITY	20638	Chloramines	Disinfection
PLUM CREEK WATER PURIFICATION FACILITY	20638	Sedimentation	Particulate removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Reducing Agents	Organics removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Microscreening	Particulate removal
PLUM CREEK WATER PURIFICATION FACILITY	20638	Innovative	Particulate removal
PS MILLER WTP	3563	Hypochlorination, Post	Disinfection
PS MILLER WTP	3563	Filtration, Rapid Sand	Iron removal
PS MILLER WTP	3563	Innovative	Disinfection
PS MILLER WTP	3563	Chloramines	Disinfection
TREATMENT FOR ROCK STREET WELL 9	3564	Hypochlorination, Pre	Disinfection
TREATMENT FOR ROCK STREET WELL 9	3564	Inhibitor, Polyphosphate	Corrosion control
TREATMENT FOR WELL NO 10 ARAPAHOE	3565	Filtration, Greensand	Iron removal
TREATMENT FOR WELL NO 10 ARAPAHOE	3565	Hypochlorination, Pre	Disinfection
TREATMENT FOR WELL NO 10 ARAPAHOE	3565	Filtration, Rapid Sand	Iron removal
FOUNDERS GREEN WTP	3566	Filtration, Rapid Sand	Particulate removal
FOUNDERS GREEN WTP	3566	Hypochlorination, Post	Disinfection
FOUNDERS GREEN WTP	3566	Innovative	Disinfection
FOUNDERS GREEN WTP	3566	Chloramines	Disinfection
FOUNDERS GREEN WTP	3566	Coagulation	Inorganics removal
TREATMENT FOR SOUTH GLOVERS 2 WELL NO 7	3567	Filtration, Greensand	Iron removal
TREATMENT FOR SOUTH GLOVERS 2 WELL NO 7	3567	Filtration, Rapid Sand	Iron removal
TREATMENT FOR SOUTH GLOVERS 2 WELL NO 7	3567	Hypochlorination, Pre	Disinfection
MEADOWS WTP	3568	Hypochlorination, Post	Disinfection
MEADOWS WTP	3568	Filtration, Rapid Sand	Particulate removal
MEADOWS WTP	3568	Innovative	Disinfection
MEADOWS WTP	3568	Chloramines	Disinfection
MEADOWS WTP	3568	Coagulation	Particulate removal

1 - 44 of 44

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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