Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CO0121125
PWS Name	CHEROKEE MD
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	29610
County Served	El Paso

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 and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	3501176	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	3501177	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	3501173	Returned to Compliance	01-APR-2016	30-JUN-2016	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	3501171	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	3501172	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	3501170	Returned to Compliance	01-JUL-2013	30-SEP-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	3501107	Returned to Compliance	01-JAN-2007	31-MAR-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	3501168	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	3501137	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	3501108	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	3501139	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	3501140	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	3501109	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	3501110	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	3501141	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	3501111	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	3501142	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	3501112	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	3501143	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	3501113	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	3501144	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	3501145	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	3501114	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	3501146	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	3501115	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	3501147	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	3501116	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	3501148	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	3501117	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	3501118	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	3501149	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	3501150	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	3501119	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	3501120	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	3501151	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	3501121	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	3501152	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfoxide	3501153	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfoxide	3501122	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfone	3501154	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfone	3501123	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	3501124	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	3501155	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb	3501125	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb	3501156	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	3501126	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	3501157	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	3501158	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	3501127	Returned to Compliance	01-JAN-2005	31-DEC-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	3501128	Returned to Compliance	01-JAN-2005	31-DEC-2007	No

1 - 50 of 69

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
837	3501176	SOX	State Compliance achieved	13-SEP-2024	State	FTM DBPs in 2023 RTC through timely 2024 samples collected 09/13/24 reported 09/30/24 (lfra 11/12/24);
837	3501177	SOX	State Compliance achieved	13-SEP-2024	State	FTM DBPs in 2023 RTC through timely 2024 samples collected 09/13/24 reported 09/30/24 (lfra 11/12/24);
828	3501171	SOX	State Compliance achieved	24-FEB-2017	State	System took required routine sample in 1Q 2017. hpo
827	3501173	SOX	State Compliance achieved	22-AUG-2016	State	System collected full round of IOCs in 3Q 2016. hpo
822	3501172	SOX	State Compliance achieved	16-MAY-2016	State	RTC'd by submitting sample results. AS
817	3501170	SOX	State Compliance achieved	15-NOV-2013	State	late reporting violation. data received one day too late.
814	3501108	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501109	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501110	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501111	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501112	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501113	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501114	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501115	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501116	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501117	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501118	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501119	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501120	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501121	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501122	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501123	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501124	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501125	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501126	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501127	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501128	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501129	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501130	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501131	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501132	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501133	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501134	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501135	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501136	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501137	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501138	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501139	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501140	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501141	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501142	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501143	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501144	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501145	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501146	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501147	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501148	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501149	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501150	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09
814	3501151	SOX	State Compliance achieved	26-AUG-2009	State	RTC w/ receipt of samples satisfying 2008-2010 SOC monitoring requirements. scs 9/16/09

1 - 50 of 69

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
PURCHASED FROM CO0121150	16532	Yes	Consecutive Connection	Surface water	Emergency	Active
WELL NO 14	2144	Yes	Well	Ground water	Permanent	Inactive
GALV2 WELL FROM WOODMEN HILLS MD	18629	Yes	Well	Ground water	Permanent	Inactive
GALV1 WELL FROM WOODMEN HILLS MD	18628	Yes	Well	Ground water	Permanent	Inactive
WELL 21 SWEETWATER 5	23430	Yes	Well	Ground water	Permanent	Active
WELL DN-4	22269	Yes	Well	Ground water	Permanent	Active
WELL NO 8	2153	Yes	Well	Ground water	Permanent	Active
WELL NO 7	2152	Yes	Well	Ground water	Permanent	Active
WELL NO 6	2151	Yes	Well	Ground water	Permanent	Active
WELL NO 5	2150	Yes	Well	Ground water	Permanent	Active
WELL NO 4	2149	Yes	Well	Ground water	Permanent	Active
WELL NO 3	2148	Yes	Well	Ground water	Permanent	Active
WELL NO 16	2147	Yes	Well	Ground water	Permanent	Active
WELL NO 1	2146	Yes	Well	Ground water	Permanent	Active
WELL NO 15	2145	Yes	Well	Ground water	Permanent	Active
WELL NO 13	2143	Yes	Well	Ground water	Permanent	Active
WELL NO 12	2142	Yes	Well	Ground water	Permanent	Active
WELL AR-1	21412	Yes	Well	Ground water	Permanent	Active
WELL NO 11	2141	Yes	Well	Ground water	Permanent	Active
WELL NO 10	2140	Yes	Well	Ground water	Permanent	Active
WELL NO 9	2139	Yes	Well	Ground water	Permanent	Active
WELL NO 19 DUNCAN WELL	20357	Yes	Well	Ground water	Permanent	Active
WELL NO 20 GOSS WELL	20311	Yes	Well	Ground water	Permanent	Active
WELL NO 18 TIPTON	18535	Yes	Well	Ground water	Permanent	Active
WELL NO 17	15090	Yes	Well	Ground water	Permanent	Active
WELL NO 2	14839	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	6670	No	Distribution System/Zone	-	-	Active
BOOSTER PUMP NO 1	18536	No	Pump Facility	-	-	Active
BOOSTER NO 1 ADDITION	18537	No	Pump Facility	-	-	Active
BOOSTER NO 2	18538	No	Pump Facility	-	-	Active
ELLICOTT TANK BOOSTER STATION - PUMPS	18540	No	Pump Facility	-	-	Active
ELLICOTT RAW BOOSTER STATION TANK	18531	No	Storage	-	-	Active
STORAGE TANK NO 3	18532	No	Storage	-	-	Active
STORAGE TANK NO 4	18533	No	Storage	-	-	Active
STORAGE TANK NO 2	18534	No	Storage	-	-	Active
SUNDANCE TANK NO 7	21414	No	Storage	-	-	Active
FRANK TANK NO 6	21478	No	Storage	-	-	Active
STORAGE TANK NO 1 REPLACEMENT	22337	No	Storage	-	-	Active
STORAGE TANK NO 1	1170	No	Storage	-	-	Inactive
SHRIEVER AFB	1171	No	Storage	-	-	Inactive
POWERS DAIRY	1172	No	Storage	-	-	Inactive
VIEW POINT AT ANTELOPE ACRES	1173	No	Storage	-	-	Inactive
BLDG 192 CHLORINE BOOSTER STATION	15091	No	Treatment Plant	-	-	Active
SUNDANCE PUMP STATION AND TREATMENT PLAN	21413	No	Treatment Plant	-	-	Active
ELLICOTT TANK BOOSTER STATION - CL2	3687	No	Treatment Plant	-	-	Active
ELLICOTT SPRINGS SUBDIVISION WTP	3688	No	Treatment Plant	-	-	Active
FLUORIDATION POINT	3686	No	Treatment Plant	-	-	Inactive

1 - 47 of 47

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
BLDG 192 CHLORINE BOOSTER STATION	15091	Gaseous Chlorination, Post	Disinfection
SUNDANCE PUMP STATION AND TREATMENT PLAN	21413	Hypochlorination, Post	Disinfection
SUNDANCE PUMP STATION AND TREATMENT PLAN	21413	Innovative	Iron removal
SUNDANCE PUMP STATION AND TREATMENT PLAN	21413	Innovative	Disinfection
FLUORIDATION POINT	3686	Fluoridation	Other
ELLICOTT TANK BOOSTER STATION - CL2	3687	Innovative	Inorganics removal
ELLICOTT TANK BOOSTER STATION - CL2	3687	Hypochlorination, Post	Disinfection
ELLICOTT SPRINGS SUBDIVISION WTP	3688	Hypochlorination, Post	Disinfection
ELLICOTT SPRINGS SUBDIVISION WTP	3688	Innovative	Disinfection

1 - 9 of 9

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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