Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	090400051
PWS Name	Colorado River Regional Water System
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	8490
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
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04000513A8000122025	Known	01-DEC-2025	31-DEC-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	0400051270999102025	Known	01-OCT-2025	31-DEC-2025	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04000514B800032025	Returned to Compliance	01-MAR-2025	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040005103104012025	Known	01-JAN-2025	31-DEC-2025	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	0400051665000102023	Returned to Compliance	29-OCT-2023	-	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040005103102512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	040005103100512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040005103104012021	Returned to Compliance	01-JAN-2021	31-DEC-2021	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040005130245612021	Returned to Compliance	01-JAN-2021	31-DEC-2021	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	040005130295012021	Returned to Compliance	01-JAN-2021	31-DEC-2021	No
TT	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04000512A800042020	Returned to Compliance	01-APR-2020	-	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040005103104012017	Returned to Compliance	01-JAN-2017	31-DEC-2017	No
MCL	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04000511A800092016	Returned to Compliance	01-SEP-2016	30-SEP-2016	Yes
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04000513A800062016	Returned to Compliance	01-JUN-2016	30-JUN-2016	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040005103104012016	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0400051757500102015	Returned to Compliance	01-OCT-2015	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	0400051223100102015	Returned to Compliance	01-OCT-2015	31-OCT-2015	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040005175750062015	Returned to Compliance	01-JUN-2015	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	040005122310062015	Returned to Compliance	01-JUN-2015	30-JUN-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	040005122310052015	Returned to Compliance	01-MAY-2015	31-MAY-2015	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040005175750052015	Returned to Compliance	01-MAY-2015	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	040005124310052014	Returned to Compliance	01-MAY-2014	31-MAY-2014	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	040005122310052014	Returned to Compliance	01-MAY-2014	31-MAY-2014	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400051450700320144	Returned to Compliance	31-MAR-2014	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400051450700320142	Returned to Compliance	31-MAR-2014	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400051450700320145	Returned to Compliance	31-MAR-2014	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400051450700320141	Returned to Compliance	31-MAR-2014	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400051450700320140	Returned to Compliance	31-MAR-2014	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400051450700320143	Returned to Compliance	31-MAR-2014	-	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	040005152500012014	Returned to Compliance	01-JAN-2014	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	040005127295012012	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040005127245612012	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	040005102295042011	Returned to Compliance	01-APR-2011	30-JUN-2011	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	040005127295042011	Returned to Compliance	01-APR-2011	30-JUN-2011	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040005127245642011	Returned to Compliance	01-APR-2011	30-JUN-2011	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	040005127295012011	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040005127245612011	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	040005102295012011	Returned to Compliance	01-JAN-2011	31-MAR-2011	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	0400051272950102010	Returned to Compliance	01-OCT-2010	31-DEC-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	0400051272456102010	Returned to Compliance	01-OCT-2010	31-DEC-2010	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	040005124310082008	Returned to Compliance	01-AUG-2008	31-AUG-2008	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	0400051223100102007	Returned to Compliance	01-OCT-2007	31-OCT-2007	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	040005171700072006	Returned to Compliance	01-JUL-2006	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	040005171700072005	Returned to Compliance	01-JUL-2005	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	040005171700072004	Returned to Compliance	01-JUL-2004	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040005127245612004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	040005127295012004	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	040005124310022003	Returned to Compliance	01-FEB-2003	28-FEB-2003	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	040005171700072002	Returned to Compliance	01-JUL-2002	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	040005123310022001	Returned to Compliance	01-FEB-2001	28-FEB-2001	No

1 - 50 of 57

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
0400051IA06112512165	04000514B800032025	EIA	Federal Violation/Reminder Notice	11-JUN-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400051OX03192411688	0400051665000102023	EOX	Federal Compliance achieved	19-MAR-2024	Region	Certificate of delivery received on 3/19/2024.
0400051OX12202211434	040005103104012021	EOX	Federal Compliance achieved	20-DEC-2022	Region	Subsequent reporting of required results.
0400051OX08282211203	040005130245612021	EOX	Federal Compliance achieved	28-AUG-2022	Region	Subsequent reporting of required results.
0400051OX08282211203	040005130295012021	EOX	Federal Compliance achieved	28-AUG-2022	Region	Subsequent reporting of required results.
0400051OX06112010394	04000512A800042020	EOX	Federal Compliance achieved	11-JUN-2020	Region	Assessment was conducted on 6/8/2020 and submitted to EPA on 6/11/2020.
0400051OX03011890874	040005103104012016	EOX	Federal Compliance achieved	01-MAR-2018	Region	Subsequent reporting of required results.
0400051OX03011890875	040005103104012017	EOX	Federal Compliance achieved	01-MAR-2018	Region	Subsequent reporting of required results.
0400051OX09261790129	040005152500012014	EOX	Federal Compliance achieved	26-SEP-2017	Region	Samples were taken on 9/26/2017.
0400051OX11011686084	04000511A800092016	EOX	Federal Compliance achieved	01-NOV-2016	Region	All required routine samples from October were all negative.
0400051OX08011686039	04000513A800062016	EOX	Federal Compliance achieved	01-AUG-2016	Region	All required routine samples from July were all negative.
0400051OX06271685337	0400051757500102015	EOX	Federal Compliance achieved	27-JUN-2016	Region	Post notices on 2015 CCR.
0400051OX06271685336	040005175750062015	EOX	Federal Compliance achieved	27-JUN-2016	Region	Post notices on 2015 CCR.
0400051OX06271685335	040005175750052015	EOX	Federal Compliance achieved	27-JUN-2016	Region	Post notices on 2015 CCR.
0400051OX02161683010	0400051223100102015	EOX	Federal Compliance achieved	16-FEB-2016	Region	-
0400051OX01261686127	0400051450700320140	EOX	Federal Compliance achieved	26-JAN-2016	Region	During the course of sanitary survey, this deficiency had been corrected.
0400051OX11161582029	0400051450700320141	EOX	Federal Compliance achieved	16-NOV-2015	Region	Fixed 11/6/15
0400051OX11161582030	0400051450700320142	EOX	Federal Compliance achieved	16-NOV-2015	Region	Fixed 11/6/15
0400051OX08111581179	040005122310062015	EOX	Federal Compliance achieved	11-AUG-2015	Region	clean samples 7/13
0400051OX08111581178	040005122310052015	EOX	Federal Compliance achieved	11-AUG-2015	Region	clean samples 7/13
0400051OX10221476331	0400051450700320143	EOX	Federal Compliance achieved	22-OCT-2014	Region	corrected on 4/29/14, one month late
0400051OX10221476332	0400051450700320144	EOX	Federal Compliance achieved	22-OCT-2014	Region	corrected on 4/29/14, one month late
0400051OX10211476326	040005124310052014	EOX	Federal Compliance achieved	21-OCT-2014	Region	-
0400051OX10211476325	040005122310052014	EOX	Federal Compliance achieved	21-OCT-2014	Region	-
0400051OX01011484244	0400051450700320145	EOX	Federal Compliance achieved	01-JAN-2014	Region	The PWS inactivated GW001, GW002, and GW003.
0400051OX03171269920	040005127245612012	EOX	Federal Compliance achieved	17-MAR-2012	Region	date entry error, violations were in error
0400051OX03171269919	040005127295012012	EOX	Federal Compliance achieved	17-MAR-2012	Region	date entry error, violations were in error
0400051OX09241165572	040005102295012011	EOX	Federal Compliance achieved	24-SEP-2011	Region	Recently submitted results brings RAA down below MCL.
0400051OX09241165566	0400051272950102010	EOX	Federal Compliance achieved	24-SEP-2011	Region	Quarterly DBPR (Stage 1) results submitted.
0400051OX09241165567	0400051272456102010	EOX	Federal Compliance achieved	24-SEP-2011	Region	Quarterly DBPR (Stage 1) results submitted.
0400051OX09241165570	040005127295042011	EOX	Federal Compliance achieved	24-SEP-2011	Region	Quarterly DBPR (Stage 1) results submitted.
0400051OX09241165568	040005127295012011	EOX	Federal Compliance achieved	24-SEP-2011	Region	Quarterly DBPR (Stage 1) results submitted.
0400051OX09241165571	040005127245642011	EOX	Federal Compliance achieved	24-SEP-2011	Region	Quarterly DBPR (Stage 1) results submitted.
0400051OX09241165569	040005127245612011	EOX	Federal Compliance achieved	24-SEP-2011	Region	Quarterly DBPR (Stage 1) results submitted.
0400051OX09241165573	040005102295042011	EOX	Federal Compliance achieved	24-SEP-2011	Region	Recently submitted results brings RAA down below MCL.
0400051OX01200938164	0400051233100121994	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938177	0400051263100101994	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938165	0400051223100101998	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938168	040005171700072005	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938167	040005171700072004	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938163	040005127295012004	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938183	040005127245612004	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938182	040005124310082008	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938169	040005124310022003	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938166	040005123310031996	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938170	040005123310022001	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938174	040005122310041997	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX01200938173	0400051223100102007	EOX	Federal Compliance achieved	20-JAN-2009	Region	-
0400051OX07110730826	040005171700072006	EOX	Federal Compliance achieved	11-JUL-2007	Region	CCR received for violation year with proof of publication and acceptable quality.
0400051OX0914042471	040005171700072002	EOX	Federal Compliance achieved	14-SEP-2004	Region	received CCR in mail

1 - 50 of 52

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
Well 2 (Parker - brackish)	0400051GW005	Yes	Consecutive Connection	Ground water	Other	Inactive
Main Well (Agency Road Well 3)	0400051GW007	Yes	Well	Ground water	Permanent	Active
Corner Well (Agency Road Well 1)	0400051GW006	Yes	Well	Ground water	Permanent	Active
Well 4, Parker Never used	0400051GW009	Yes	Well	Ground water	Other	Inactive
BIA Well #47	0400051GW008	Yes	Well	Ground water	Other	Inactive
Well #4 Osborne Plant	0400051GW004	Yes	Well	Ground water	Other	Inactive
Well #3 Osborne Plant	0400051GW003	Yes	Well	Ground water	Other	Inactive
Well #2 Osborne Plant	0400051GW002	Yes	Well	Ground water	Other	Inactive
Well #1 Osborne Plant	0400051GW001	Yes	Well	Ground water	Other	Inactive
Colorado River Intake at Osborne Wash Treatment Plant	0400051SW001	Yes	Intake	Surface water	Emergency	Inactive
Town of Parker	0400051GW010	Yes	Consecutive Connection	Ground water	Seasonal	Active
Entry Point from Agency Road Well 3 TP	0400051EP002	No	Common Headers	-	-	Active
Entry Point from Agency Road Well 1 TP	0400051EP003	No	Common Headers	-	-	Active
Entry point from town of Parker, AZ	0400051EP004	No	Common Headers	-	-	Active
Entry Point from Osborne Wash Treatment	0400051EP001	No	Common Headers	-	-	Inactive
PWS# 0400051 distribution system	0400051DS001	No	Distribution System/Zone	-	-	Active
Common header for wells 1,2,3,4 & SW001 Osb. TP	0400051CH001	No	Other	-	-	Inactive
Storage Tank 1 (Old)	0400051ST001	No	Storage	-	-	Active
Storage Tank 2 (New)	0400051ST002	No	Storage	-	-	Active
Headstart Elevated Tank	0400051ST003	No	Storage	-	-	Inactive
Ground Level Poston	0400051ST004	No	Storage	-	-	Inactive
Elevated Tank Poston	0400051ST005	No	Storage	-	-	Inactive
Elevated Tank Le Pera School	0400051ST006	No	Storage	-	-	Inactive
Main Well (Agency Road Well 3) Treatment Plant	0400051TP002	No	Treatment Plant	-	-	Active
Corner Well (Agency Road Well 1) Treatment Plant	0400051TP003	No	Treatment Plant	-	-	Active
Osborne Wash Treatment Plant	0400051TP001	No	Treatment Plant	-	-	Inactive

1 - 26 of 26

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
Osborne Wash Treatment Plant	0400051TP001	Gaseous Chlorination, Pre	Disinfection
Osborne Wash Treatment Plant	0400051TP001	Permanganate	Iron removal
Osborne Wash Treatment Plant	0400051TP001	Filtration, Greensand	Iron removal
Osborne Wash Treatment Plant	0400051TP001	Gaseous Chlorination, Post	Disinfection
Osborne Wash Treatment Plant	0400051TP001	Permanganate	Manganese removal
Osborne Wash Treatment Plant	0400051TP001	Filtration, Greensand	Manganese removal
Main Well (Agency Road Well 3) Treatment Plant	0400051TP002	Gaseous Chlorination, Post	Disinfection
Main Well (Agency Road Well 3) Treatment Plant	0400051TP002	Filtration, Greensand	Iron removal
Main Well (Agency Road Well 3) Treatment Plant	0400051TP002	Gaseous Chlorination, Pre	Manganese removal
Main Well (Agency Road Well 3) Treatment Plant	0400051TP002	Gaseous Chlorination, Pre	Iron removal
Corner Well (Agency Road Well 1) Treatment Plant	0400051TP003	Gaseous Chlorination, Post	Disinfection

1 - 11 of 11

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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