Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	093200360
PWS Name	Walker River Paiute Tribe
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	662
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
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	320036002100542025	Returned to Compliance	01-APR-2025	30-JUN-2025	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	320036003104012025	Known	01-JAN-2025	31-DEC-2025	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	320036002100512025	Returned to Compliance	01-JAN-2025	31-MAR-2025	Yes
RPT	Notification, Known or Potential LSL	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	32003604H5200112024	Open	16-NOV-2024	-	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	3200360031005102024	Returned to Compliance	01-OCT-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3200360270999102024	Returned to Compliance	01-OCT-2024	31-DEC-2024	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	320036075750092024	Returned to Compliance	01-SEP-2024	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	32003603A800092024	Returned to Compliance	01-SEP-2024	30-SEP-2024	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	32003604B800082024	Returned to Compliance	01-AUG-2024	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	320036027099972024	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	320036027245612024	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	320036027295012024	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	3200360270999102023	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	320036075750032023	Returned to Compliance	21-MAR-2023	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	320036045070032023	Open	21-MAR-2023	-	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	320036003201512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	320036003202012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	320036003203112023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	320036003203212023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	320036003203312023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	320036003203412023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	320036003203512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	320036003203612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	320036003203712023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	320036003203912023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	320036003204012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	320036003204112023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	320036003204612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	320036003205012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	320036003205112023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	320036003206312023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	320036003206512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	320036003206712023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	320036003238312023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	320036003210512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	320036003211012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	320036003102412023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	320036003102512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	320036003227412023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	320036003230612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	320036003232612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	320036003295912023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	320036003293112023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	320036003201012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	320036003200512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	320036003294612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	320036003204212023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	320036027099972021	Returned to Compliance	01-JUL-2021	30-SEP-2021	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	320036027099942021	Returned to Compliance	01-APR-2021	30-JUN-2021	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	3200360450700112020	Returned to Compliance	27-NOV-2020	-	Yes

1 - 50 of 335

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
3200360IA09162512251	320036002100542025	EIA	Federal Violation/Reminder Notice	16-SEP-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
3200360OX08192512300	320036027245612024	EOX	Federal Compliance achieved	19-AUG-2025	Region	Subsequent reporting of required results.
3200360OX08192512300	320036027295012024	EOX	Federal Compliance achieved	19-AUG-2025	Region	Subsequent reporting of required results.
3200360OX07282512198	320036002100512025	EOX	Federal Compliance achieved	28-JUL-2025	Region	Results reported below MCL (or RAA below MCL).
3200360OX07032512202	320036075750092024	EOX	Federal Compliance achieved	03-JUL-2025	Region	Posted with 2024 CCR.
3200360IA04032512083	3200360270999102024	EIA	Federal Violation/Reminder Notice	03-APR-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
3200360OX01152512054	3200360031005102024	EOX	Federal Compliance achieved	15-JAN-2025	Region	Resumed quarterly arsenic monitoring.
3200360OX10042411925	32003603A800092024	EOX	Federal Compliance achieved	04-OCT-2024	Region	Resumed sampling in October.
3200360OX09162411925	32003604B800082024	EOX	Federal Compliance achieved	16-SEP-2024	Region	Reported result.
3200360OX08202411925	320036027099972024	EOX	Federal Compliance achieved	20-AUG-2024	Region	Reported chlorine residual in August.
3200360OX06262412054	320036075750032023	EOX	Federal Compliance achieved	26-JUN-2024	Region	Posted public notice in 2023 CCR.
3200360OX01102411732	3200360270999102023	EOX	Federal Compliance achieved	10-JAN-2024	Region	Subsequent reporting of required results.
3200360OX03242311402	3200360450700112020	EOX	Federal Compliance achieved	24-MAR-2023	Region	Operator has achieved T1 and D1 and has been granted an extension to complete T2
3200360OX09152110898	320036027099972021	EOX	Federal Compliance achieved	15-SEP-2021	Region	Subsequent reporting of required results.
3200360OX09152110898	320036027099942021	EOX	Federal Compliance achieved	15-SEP-2021	Region	Subsequent reporting of required results.
3200360OX08212010533	320036003104012019	EOX	Federal Compliance achieved	21-AUG-2020	Region	Subsequent reporting of required results.
3200360OX08212010533	320036030295012019	EOX	Federal Compliance achieved	21-AUG-2020	Region	Subsequent reporting of required results.
3200360OX08212010533	320036030245612019	EOX	Federal Compliance achieved	21-AUG-2020	Region	Subsequent reporting of required results.
3200360OX06292012054	320036075750072019	EOX	Federal Compliance achieved	29-JUN-2020	Region	Posted public notice in 2019 CCR.
3200360OX08071996401	3200360757500102018	EOX	Federal Compliance achieved	07-AUG-2019	Region	Subsequent reporting of required results.
3200360OX08071996402	32003603A800072019	EOX	Federal Compliance achieved	07-AUG-2019	Region	Subsequent reporting of required results.
3200360OX11301893998	32003603A8000102018	EOX	Federal Compliance achieved	30-NOV-2018	Region	Subsequent reporting of required results.
3200360OX10151893997	320036003104012017	EOX	Federal Compliance achieved	15-OCT-2018	Region	Subsequent reporting of required results.
3200360OX10151893999	320036030245612017	EOX	Federal Compliance achieved	15-OCT-2018	Region	Subsequent reporting of required results.
3200360OX07031891875	320036030295012017	EOX	Federal Compliance achieved	03-JUL-2018	Region	Subsequent reporting of required results.
3200360OX07241788626	320036003100542017	EOX	Federal Compliance achieved	24-JUL-2017	Region	Subsequent reporting of required results.
3200360OX11301687279	32003603A8000102016	EOX	Federal Compliance achieved	30-NOV-2016	Region	Subsequent reporting of required results.
3200360OX10131686164	320036030245612015	EOX	Federal Compliance achieved	13-OCT-2016	Region	Subsequent reporting of required results.
3200360OX10131686163	320036030295012015	EOX	Federal Compliance achieved	13-OCT-2016	Region	Subsequent reporting of required results.
3200360OX09221686162	32003603A800042016	EOX	Federal Compliance achieved	22-SEP-2016	Region	Subsequent reporting of required results.
3200360OX12121479226	320036027245612014	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479160	320036027295012013	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479225	320036027295012014	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479162	320036003101012011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479163	320036003101512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479164	320036003102012011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479170	320036003102412011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479165	320036003102512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479166	320036003103512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479159	320036003104012013	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479224	320036003104012014	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479167	320036003104512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479168	320036003107412011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479169	320036003107512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479171	320036003108512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479195	320036003200512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479182	320036003201012011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479183	320036003201512011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479186	320036003202012011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.
3200360OX12121479189	320036003203112011	EOX	Federal Compliance achieved	12-DEC-2014	Region	Subsequent reporting of required results.

1 - 50 of 300

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
West Well	3200360GW003	Yes	Well	Ground water	Other	Inactive
Well #2	3200360GW002	Yes	Well	Ground water	Permanent	Active
Well #1	3200360GW001	Yes	Well	Ground water	Permanent	Active
Entry Point to TP001	3200360EP001	No	Common Headers	-	-	Active
PWS# 3200360 distribution system	3200360DS001	No	Distribution System/Zone	-	-	Active
Storage Tank 1	3200360ST001	No	Storage	-	-	Active
West Water Storage Tank	3200360ST002	No	Storage	-	-	Inactive
Microfiltration - Arsenic Removal	3200360TP001	No	Treatment Plant	-	-	Active

1 - 8 of 8

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
Microfiltration - Arsenic Removal	3200360TP001	pH Adjustment, Pre	Inorganics removal
Microfiltration - Arsenic Removal	3200360TP001	Filtration, Ultrafiltration	Inorganics removal
Microfiltration - Arsenic Removal	3200360TP001	Hypochlorination, Pre	Inorganics removal
Microfiltration - Arsenic Removal	3200360TP001	Hypochlorination, Post	Disinfection
Microfiltration - Arsenic Removal	3200360TP001	pH Adjustment, Post	Inorganics removal

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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