Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	085690004
PWS Name	ARAPAHOE COMM WATER SYSTEM
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	4100
County Served

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, Source Water (GWR)	Ground Water Rule	E. COLI	63912	Returned to Compliance	14-JAN-2026	-	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	63909	Returned to Compliance	09-OCT-2024	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	63858	Returned to Compliance	01-APR-2020	30-APR-2020	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	63861	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	63863	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	63862	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	63860	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	63864	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	63709	Returned to Compliance	01-JAN-2019	31-DEC-2019	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	63710	Returned to Compliance	01-JAN-2019	31-DEC-2019	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	63711	Returned to Compliance	01-JAN-2019	31-DEC-2019	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	63706	Returned to Compliance	01-SEP-2017	31-AUG-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	63705	Returned to Compliance	01-SEP-2017	31-AUG-2018	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	63680	Returned to Compliance	24-AUG-2016	-	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	63662	Returned to Compliance	01-JAN-2013	31-DEC-2013	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	63653	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	63648	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	63646	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	63645	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	63644	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	63643	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	63642	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	63641	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	63640	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	63639	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	63638	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	63637	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	63636	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	63635	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	63634	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	63633	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	63632	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	63631	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	63630	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	63629	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	63628	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	63627	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	63655	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	63654	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	63626	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	63625	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	63624	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	63623	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	63622	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	63621	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	63620	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	63619	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	63618	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	63617	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	63616	Returned to Compliance	01-JAN-2011	31-MAR-2011	No

1 - 50 of 358

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
16165	63912	SOX	State Compliance achieved	10-MAR-2026	Region	PWS RTC'd when they collected a triggered sample from WL02, before treatment, since that was the last well running that filled the storage tank that served the distribution system on 1/6/26 when there was a TC+ routine sample result. The triggered sample was collected on 3/6/26 and received by EPA on 3/10/26. jsh 3/11/26
16161	63909	SOX	State Compliance achieved	16-OCT-2024	Region	PWS RTC'd when they took 2 TG samples before treatment on 10/16/24. These samples have the wrong PWSID on the lab report but the email from the PWS has the correct PWSID. ECAD said it's ok to accept reports if PWSID is on email. JSH 10/29/24
16155	63860	SOX	State Compliance achieved	16-FEB-2023	Region	Data is in for SP03. kl
16155	63861	SOX	State Compliance achieved	16-FEB-2023	Region	Data is in for SP03. kl
16155	63864	SOX	State Compliance achieved	16-FEB-2023	Region	Data is in for SP03. kl
16155	63863	SOX	State Compliance achieved	16-FEB-2023	Region	Data is in for SP03. kl
16155	63862	SOX	State Compliance achieved	16-FEB-2023	Region	Data is in for SP03. kl
16152	63858	SOX	State Compliance achieved	15-SEP-2020	Region	PWS RTC'd when EPA received 3 samples on 5/5/2020. JSH 9/15/2020
16149	63710	SOX	State Compliance achieved	09-DEC-2019	Region	Late reporting, sampled on 12/9/2019 but never sent result. RTC violation. -KS 3/4/2020
16149	63709	SOX	State Compliance achieved	09-DEC-2019	Region	Late reporting, sampled on 12/9/2019 but never sent result. RTC violation. -KS 3/4/2020
16149	63711	SOX	State Compliance achieved	09-DEC-2019	Region	Late reporting, sampled on 12/9/2019 but never sent result. RTC violation. -KS 3/4/2020
16142	63680	SOX	State Compliance achieved	05-SEP-2019	Region	-
16140	63705	SOX	State Compliance achieved	07-FEB-2019	Region	Sample received late. SWT 2/7/2019
16140	63706	SOX	State Compliance achieved	07-FEB-2019	Region	Sample received late. SWT 2/7/2019
16137	63662	SIF	State Public Notification received	08-JUL-2014	Region	Public notice received. MC - 8/7/14
16133	63657	SOX	State Compliance achieved	06-SEP-2012	Region	-
16133	63660	SOX	State Compliance achieved	06-SEP-2012	Region	-
16133	63659	SOX	State Compliance achieved	06-SEP-2012	Region	-
16133	63658	SOX	State Compliance achieved	06-SEP-2012	Region	-
16130	63649	SOX	State Compliance achieved	10-MAY-2012	Region	-
16130	63650	SOX	State Compliance achieved	10-MAY-2012	Region	-
16130	63651	SOX	State Compliance achieved	10-MAY-2012	Region	-
16130	63652	SOX	State Compliance achieved	10-MAY-2012	Region	-
16130	63653	SOX	State Compliance achieved	10-MAY-2012	Region	-
16130	63654	SOX	State Compliance achieved	10-MAY-2012	Region	-
16130	63655	SOX	State Compliance achieved	10-MAY-2012	Region	-
16130	63656	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63477	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63478	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63479	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63480	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63481	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63482	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63483	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63484	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63485	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63486	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63487	SOX	State Compliance achieved	10-MAY-2012	Region	-
16129	63488	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63510	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63511	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63512	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63513	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63514	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63515	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63516	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63517	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63518	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63519	SOX	State Compliance achieved	10-MAY-2012	Region	-
16128	63520	SOX	State Compliance achieved	10-MAY-2012	Region	-

1 - 50 of 329

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL #3 (EMERGENCY BACKUP 729 WELL)	12260	Yes	Well	Ground water	Emergency	Active
WELL 04	12618	Yes	Well	Ground water	Permanent	Active
WELL #2	10865	Yes	Well	Ground water	Permanent	Active
WELL #1	10864	Yes	Well	Ground water	Permanent	Active
ARAPAHOE COMMUNITY WS	11167	No	Distribution System/Zone	-	-	Active
ARAPAHOE COMM WATER SYSTEM	11293	No	Other	-	-	Inactive
MILL CREEK PUMP STATION (2)	13080	No	Pump Facility	-	-	Active
ARAPAHOE STORAGE TANK (1MG)	11940	No	Storage	-	-	Active
MILL CREEK STORAGE TANK (125K GAL)	13079	No	Storage	-	-	Active
STORAGE TANK #1	11910	No	Storage	-	-	Inactive
BEAVER CREEK STORAGE TANK 100K GAL	11911	No	Storage	-	-	Inactive
STORAGE TANK #3	11912	No	Storage	-	-	Inactive
TREATMENT PLANT FOR WL01 & WL02	11646	No	Treatment Plant	-	-	Active
TREATMENT PLANT FOR WL 04	12619	No	Treatment Plant	-	-	Active

1 - 14 of 14

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT FOR WL01 & WL02	11646	Hypochlorination, Post	Disinfection
TREATMENT PLANT FOR WL 04	12619	Hypochlorination, Post	Disinfection

1 - 2 of 2

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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