Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	104111101
PWS Name	CTUIR PWD MISSION
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	1310
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 and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	744	Returned to Compliance	01-MAR-2025	31-MAR-2025	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	743	Returned to Compliance	17-OCT-2024	-	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	738	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	737	Returned to Compliance	01-JUL-2023	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	707	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	706	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	705	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	704	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	703	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	702	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	701	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	700	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	699	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	698	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	697	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	696	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	695	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	694	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	693	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	692	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	691	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	690	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	709	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	689	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	688	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	687	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	686	Returned to Compliance	01-JAN-2023	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	716	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	729	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	712	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	726	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	710	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	722	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	713	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	727	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	723	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	735	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	717	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	718	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	730	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	731	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	714	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	728	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	736	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	719	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	732	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	733	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	720	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	724	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	721	Returned to Compliance	01-JAN-2023	31-MAR-2023	No

1 - 50 of 619

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
50	596	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	626	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	568	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	569	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	570	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	571	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	572	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	573	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	574	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	575	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	576	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	577	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	578	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	579	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	580	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	581	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	582	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	583	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	584	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	585	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	586	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	587	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	588	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	589	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	590	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	591	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	592	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	593	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	594	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	595	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	627	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	597	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	598	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	599	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	600	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	601	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	602	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	603	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	604	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	605	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	606	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	607	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	608	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	609	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	610	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	611	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	612	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	613	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	614	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25
50	615	EOX	Federal Compliance achieved	28-OCT-2025	Region	Dioxin results received collected August 2025. -CJA 11/24/25

1 - 50 of 614

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INTERTIE WITH PENDLETON	990	Yes	Consecutive Connection	Surface water	Emergency	Inactive
Wells 1 & 2 Combined	2300084	Yes	Well	Ground water	Permanent	Inactive
WELL #5	983	Yes	Well	Ground water	Permanent	Active
WELL #4	204	Yes	Well	Ground water	Permanent	Active
WELL #2	203	Yes	Well	Ground water	Permanent	Active
WELL #1	202	Yes	Well	Ground water	Permanent	Active
WELL #3	201	Yes	Well	Ground water	Permanent	Active
WELL #6	1431	Yes	Well	Ground water	Permanent	Active
CTUIR PWD/MISSION DISTRIBUTION	449	No	Distribution System/Zone	-	-	Active
STAGE 2 DBP IDSE	1036	No	Distribution System/Zone	-	-	Inactive
MAIN BOOSTER STATION	987	No	Pump Facility	-	-	Active
WATER STORAGE TANK #3	1433	No	Storage	-	-	Active
TANK #1	988	No	Storage	-	-	Active
TANK #2	989	No	Storage	-	-	Active
WELL #6 PUMPHOUSE	1430	No	Treatment Plant	-	-	Active
WELL #1, WELL #2 PUMPHOUSE	25	No	Treatment Plant	-	-	Active
WELL #3 PUMPHOUSE	984	No	Treatment Plant	-	-	Active
WELL #4 PUMPHOUSE	985	No	Treatment Plant	-	-	Active
WELL #5 PUMPHOUSE	986	No	Treatment Plant	-	-	Active

1 - 19 of 19

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL #6 PUMPHOUSE	1430	Hypochlorination, Pre	Disinfection
WELL #1, WELL #2 PUMPHOUSE	25	Hypochlorination, Post	Disinfection
WELL #3 PUMPHOUSE	984	Hypochlorination, Pre	Disinfection
WELL #4 PUMPHOUSE	985	Hypochlorination, Pre	Disinfection
WELL #5 PUMPHOUSE	986	Hypochlorination, Pre	Disinfection

1 - 5 of 5

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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