Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA2210002
PWS Name	PONDEROSA BASIN MUTUAL WTR CO
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	798
County Served	Mariposa

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	9811009	Open	01-OCT-2024	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	9811006	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9811004	Returned to Compliance	01-JUL-2013	31-JUL-2013	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	711010	Returned to Compliance	01-AUG-2007	31-AUG-2007	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	711009	Returned to Compliance	01-FEB-2007	28-FEB-2007	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	611007	Returned to Compliance	01-AUG-2006	31-AUG-2006	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	611008	Returned to Compliance	01-JUN-2006	30-JUN-2006	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	511006	Returned to Compliance	01-OCT-2004	30-NOV-2004	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	511005	Returned to Compliance	01-OCT-2004	31-OCT-2004	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	211004	Returned to Compliance	01-DEC-2001	31-DEC-2001	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	111012	Returned to Compliance	01-JAN-2001	31-DEC-2007	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9811003	Returned to Compliance	01-JUL-1998	31-JUL-1998	Yes
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	95V0001	Returned to Compliance	01-JUL-1993	01-MAR-2000	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9311002	Returned to Compliance	01-JAN-1993	28-FEB-1993	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9311001	Returned to Compliance	01-OCT-1992	31-OCT-1992	Yes

1 - 15 of 15

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9811027	9811009	SFL	State Administrative/Compliance Order without penalty issued	17-JUL-2025	State	Citation 03-11-25C-020 Issued.
9811011	9811006	SOX	State Compliance achieved	14-AUG-2015	State	-
9811007	9811004	SOX	State Compliance achieved	09-OCT-2013	State	-
911016	111012	SOX	State Compliance achieved	25-APR-2008	State	ENF_NO:03-11-08E-021; INITAL RADIOLOGICAL MONITORING
811013	711010	SOX	State Compliance achieved	31-OCT-2007	State	ENF_NO:03-11-07C-011; ALL DIRECTIVES COMPLETED
711009	711009	SFL	State Administrative/Compliance Order without penalty issued	09-APR-2007	State	ENF_NO:03-11-07C-003; TCRMCL FOR FEB 2007
711007	611007	SIA	State Violation/Reminder Notice	24-OCT-2006	State	ENF_NO:03-11-06E-068; MR4 NO 5 ROU FOLLOWING MONTH TO POSITIVE TC SAMPLE
711008	611008	SFL	State Administrative/Compliance Order without penalty issued	17-AUG-2006	State	ENF_NO:03-11-06C-006; TCRMCL JUNE 2006
9811020	511006	SOX	State Compliance achieved	30-DEC-2004	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
9811019	511005	SOX	State Compliance achieved	30-NOV-2004	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
211006	211004	SIA	State Violation/Reminder Notice	28-FEB-2002	State	REMINDER LETTER OF REGS FIVE ROUTINE SAMPLES THE FOLLOWING MONTH(SECTION 64424)
00E0001	95V0001	EOX	Federal Compliance achieved	01-MAR-2000	ODSWeb	-
9811005	9811003	SFL	State Administrative/Compliance Order without penalty issued	01-SEP-1998	State	ENF_NO:03-11-98C-010; STANDARD TCR PN METHOD 2
9811025	9311002	SOX	State Compliance achieved	28-MAR-1993	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
9811024	9311001	SOX	State Compliance achieved	30-NOV-1992	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.

1 - 15 of 15

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CHOWCHILLA RIVER - INACTIVE	28863	Yes	Intake	Surface water	Other	Inactive
WELL 07 - INACTIVE	CA2210002008	Yes	Well	Ground water	Permanent	Inactive
WELL 03	24703	Yes	Well	Ground water	Permanent	Inactive
WELL 06	23752	Yes	Well	Ground water	Permanent	Active
WELL 09	17745	Yes	Well	Ground water	Permanent	Active
WELL 10	17729	Yes	Well	Ground water	Permanent	Active
WELL 08	17637	Yes	Well	Ground water	Permanent	Active
WELL 12	17438	Yes	Well	Ground water	Permanent	Active
WELL 11	17412	Yes	Well	Ground water	Permanent	Active
WELL 04 - INACTIVE	CA2210002005	Yes	Well	Ground water	Other	Inactive
WELL 04 - DESTROYED	23755	Yes	Well	Ground water	Other	Inactive
WELL 05 - INACTIVE	23753	Yes	Well	Ground water	Other	Inactive
WELL 01 - DESTROYED	19697	Yes	Well	Ground water	Other	Inactive
WELL 02 - DESTROYED	19681	Yes	Well	Ground water	Other	Inactive
WELL 07 - DESTROYED	17420	Yes	Well	Ground water	Other	Inactive
DISTRIBUTION SYSTEM	28864	No	Distribution System/Zone	-	-	Active
CHOWCHILLA RIVER - TREATED - INACTIVE	6582	No	Treatment Plant	-	-	Inactive

1 - 17 of 17

Treatment Processes

No treatment process(es) found. EPA has no record of treatment process(es) reported by the primacy agency for this water system.

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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