Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA0600008
PWS Name	COLUSA CO. WWD #1 - GRIMES
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	512
County Served	Colusa

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	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1221072	Open	01-OCT-2025	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221071	Known	01-OCT-2024	31-DEC-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221070	Known	01-JUL-2024	30-SEP-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221069	Known	01-APR-2024	30-JUN-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221068	Known	01-JAN-2024	31-MAR-2024	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1221066	Returned to Compliance	01-OCT-2023	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221067	Known	01-OCT-2023	31-DEC-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221065	Known	01-JUL-2023	30-SEP-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221064	Known	01-APR-2023	30-JUN-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221063	Known	01-JAN-2023	31-MAR-2023	Yes
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1221061	Returned to Compliance	01-NOV-2022	30-NOV-2022	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221062	Known	01-OCT-2022	31-DEC-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221060	Known	01-JUL-2022	30-SEP-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221059	Known	01-APR-2022	30-JUN-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221058	Known	01-JAN-2022	31-MAR-2022	Yes
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1221054	Returned to Compliance	01-OCT-2021	31-OCT-2021	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221057	Known	01-OCT-2021	31-DEC-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221056	Known	01-JUL-2021	30-SEP-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221053	Known	01-APR-2021	30-JUN-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221052	Known	01-JAN-2021	31-MAR-2021	Yes
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1221041	Returned to Compliance	01-DEC-2020	31-DEC-2020	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221051	Known	01-OCT-2020	31-DEC-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221050	Known	01-JUL-2020	30-SEP-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221049	Known	01-APR-2020	30-JUN-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221048	Known	01-JAN-2020	31-MAR-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221047	Known	01-OCT-2019	31-DEC-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221046	Known	01-JUL-2019	30-SEP-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221045	Known	01-APR-2019	30-JUN-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221044	Known	01-JAN-2019	31-MAR-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221043	Known	01-OCT-2018	31-DEC-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221042	Known	01-JUL-2018	30-SEP-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221039	Known	01-APR-2018	30-JUN-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221038	Known	01-JAN-2018	31-MAR-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221037	Known	01-OCT-2017	31-DEC-2017	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1221028	Returned to Compliance	01-OCT-2017	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221036	Known	01-JUL-2017	30-SEP-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221035	Known	01-APR-2017	30-JUN-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221034	Known	01-JAN-2017	31-MAR-2017	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	1221029	Returned to Compliance	01-JAN-2017	31-DEC-2017	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221033	Known	01-OCT-2016	31-DEC-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221032	Known	01-JUL-2016	30-SEP-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221031	Known	01-APR-2016	30-JUN-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221030	Known	01-JAN-2016	31-MAR-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221026	Returned to Compliance	01-OCT-2015	31-DEC-2015	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1221027	Returned to Compliance	01-OCT-2015	-	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221017	Returned to Compliance	01-APR-2015	30-JUN-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221025	Returned to Compliance	01-JAN-2015	31-MAR-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221016	Returned to Compliance	01-OCT-2014	31-DEC-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221015	Returned to Compliance	01-JUL-2014	30-SEP-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1221014	Returned to Compliance	01-JAN-2014	31-MAR-2014	Yes

1 - 50 of 71

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9621026	1221066	SOX	State Compliance achieved	26-SEP-2024	State	RTC samples collected.
9621022	1221061	SOX	State Compliance achieved	20-JAN-2023	State	Collected Dec. samples as scheduled.
9621020	1221054	SOX	State Compliance achieved	08-JUN-2022	State	-
9621017	1221041	SOX	State Compliance achieved	13-JAN-2021	State	-
9621015	1221027	SOX	State Compliance achieved	17-JUL-2019	State	-
9621015	1221028	SOX	State Compliance achieved	17-JUL-2019	State	-
9621013	1221029	SOX	State Compliance achieved	12-FEB-2019	State	-
9621012	1221036	SFL	State Administrative/Compliance Order without penalty issued	14-JUN-2018	State	Revision of return to compliance date
9621012	1221037	SFL	State Administrative/Compliance Order without penalty issued	14-JUN-2018	State	Revision of return to compliance date
9621012	1221038	SFL	State Administrative/Compliance Order without penalty issued	14-JUN-2018	State	Revision of return to compliance date
9621012	1221039	SFL	State Administrative/Compliance Order without penalty issued	14-JUN-2018	State	Revision of return to compliance date
9621009	1221025	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221026	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221023	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221022	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221021	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221020	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221017	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221016	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221015	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221014	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221013	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221012	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221011	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221010	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221009	SOX	State Compliance achieved	01-MAR-2018	State	-
9621009	1221024	SOX	State Compliance achieved	01-MAR-2018	State	-
9621007	1221008	SOX	State Compliance achieved	27-FEB-2018	State	-
9621007	1121007	SOX	State Compliance achieved	27-FEB-2018	State	-
9621007	1021006	SOX	State Compliance achieved	27-FEB-2018	State	-
9621007	1021005	SOX	State Compliance achieved	27-FEB-2018	State	-
9621008	1221019	SOX	State Compliance achieved	27-FEB-2018	State	-
9621007	1021003	SOX	State Compliance achieved	27-FEB-2018	State	-
9621007	921002	SOX	State Compliance achieved	27-FEB-2018	State	-
9621007	921001	SOX	State Compliance achieved	27-FEB-2018	State	-
9621007	1021004	SOX	State Compliance achieved	27-FEB-2018	State	-
921006	1221065	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221067	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221068	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221069	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221070	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221071	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221064	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221063	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221062	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221060	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221059	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221058	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221057	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL
921006	1221056	SFL	State Administrative/Compliance Order without penalty issued	05-JAN-2009	State	ENF_NO:01-21-09O-06001; ARSENIC RAA MCL

1 - 50 of 68

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 02 - STANDBY	54736	Yes	Well	Ground water	Emergency	Active
WELL 01	11802	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	24981	No	Distribution System/Zone	-	-	Active
WELL 01 - TREATED XCLD	4610	No	Treatment Plant	-	-	Active
WELL 02 - TREATED	54737	No	Treatment Plant	-	-	Active

1 - 5 of 5

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL 01 - TREATED XCLD	4610	Hypochlorination, Pre	Disinfection
WELL 02 - TREATED	54737	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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