Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA1010030
PWS Name	TRANQUILLITY IRRIGATION DISTRICT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	807
County Served	Fresno

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	9811023	Known	01-APR-2025	30-JUN-2025	Yes
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	9811022	Open	17-OCT-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	9811021	Open	17-OCT-2024	-	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	9811020	Returned to Compliance	01-OCT-2024	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	9811017	Returned to Compliance	01-NOV-2017	30-NOV-2017	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9811016	Returned to Compliance	01-APR-2015	30-APR-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9811015	Returned to Compliance	01-JAN-2015	31-JAN-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9811014	Returned to Compliance	01-DEC-2014	31-DEC-2014	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	9811013	Returned to Compliance	01-OCT-2014	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9811012	Returned to Compliance	01-MAY-2014	31-MAY-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9811011	Returned to Compliance	01-APR-2014	30-JUN-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9811010	Returned to Compliance	01-JAN-2014	31-MAR-2014	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	9811009	Returned to Compliance	01-NOV-2013	30-NOV-2013	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9811008	Returned to Compliance	01-OCT-2013	31-DEC-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9811007	Returned to Compliance	01-JUL-2013	30-SEP-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9811006	Returned to Compliance	01-APR-2013	30-JUN-2013	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	9811005	Returned to Compliance	01-FEB-2013	28-FEB-2013	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9811003	Returned to Compliance	01-JAN-2013	31-MAR-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9811002	Returned to Compliance	01-OCT-2012	31-DEC-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1223029	Returned to Compliance	01-JUL-2012	30-SEP-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1223028	Returned to Compliance	01-APR-2012	30-JUN-2012	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	9811004	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1223027	Returned to Compliance	01-JAN-2012	31-MAR-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1223026	Returned to Compliance	01-OCT-2011	31-DEC-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1123025	Returned to Compliance	01-JUL-2011	30-SEP-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1123024	Returned to Compliance	01-APR-2011	30-JUN-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1123023	Returned to Compliance	01-JAN-2011	31-MAR-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1123022	Returned to Compliance	01-OCT-2010	31-DEC-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1023021	Returned to Compliance	01-JUL-2010	30-SEP-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1023020	Returned to Compliance	01-APR-2010	30-JUN-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1023019	Returned to Compliance	01-JAN-2010	31-MAR-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1023018	Returned to Compliance	01-OCT-2009	31-DEC-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	923017	Returned to Compliance	01-JUL-2009	30-SEP-2009	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	923014	Returned to Compliance	01-APR-2009	30-APR-2009	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	923015	Returned to Compliance	01-APR-2009	30-JUN-2009	Yes
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	923016	Returned to Compliance	01-MAR-2009	31-MAR-2009	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	923013	Returned to Compliance	01-JAN-2009	31-MAR-2009	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	923012	Returned to Compliance	01-DEC-2008	31-DEC-2008	No
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	912011	Returned to Compliance	01-OCT-2008	31-DEC-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	712010	Returned to Compliance	01-JUL-2007	30-SEP-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	712009	Returned to Compliance	01-JAN-2007	31-MAR-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	712008	Returned to Compliance	01-OCT-2006	31-DEC-2006	Yes
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	612007	Returned to Compliance	01-JAN-2006	31-JAN-2006	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	412006	Returned to Compliance	01-JUN-2004	30-JUN-2004	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	312005	Returned to Compliance	01-DEC-2002	31-DEC-2002	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	212004	Returned to Compliance	01-JUL-2002	31-JUL-2002	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	112003	Returned to Compliance	01-JAN-2001	31-DEC-2001	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	11002	Returned to Compliance	01-MAY-2000	31-MAY-2000	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9811001	Returned to Compliance	01-SEP-1998	30-SEP-1998	Yes
Other	Notification, Public	Miscellaneous Other Rules	-	9000018	Known	01-DEC-1989	31-DEC-1989	No

1 - 50 of 50

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9912020	9811020	SOX	State Compliance achieved	26-JUN-2025	State	LCR Sample collected 06/26/2025
9912021	9811023	SFL	State Administrative/Compliance Order without penalty issued	06-MAY-2025	State	Arsenic MCL
9912018	9811017	SOX	State Compliance achieved	28-DEC-2021	State	RTC FOLLOWING MONITORING
9912013	9811012	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811009	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811005	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811004	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811001	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	923016	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	923014	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	923012	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	612007	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	412006	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	312005	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	212004	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	112003	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	11002	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811013	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811014	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811015	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912013	9811016	SOX	State Compliance achieved	01-MAR-2018	State	RTC after review.
9912009	9811007	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	9811008	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	9811010	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	9811011	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	9811006	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	9811003	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	9811002	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1223029	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1223028	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1223027	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1223026	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1123025	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1123024	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1123023	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1123022	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1023021	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1023020	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1023019	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	1023018	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	923017	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	923015	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	923013	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	912011	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	712010	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	712009	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells
9912009	712008	SOX	State Compliance achieved	18-SEP-2014	State	Returned to Compliance for As MCL Exceedance with connection to new wells

1 - 47 of 47

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 04 - RAW - INAC2022	11903	Yes	Well	Ground water	Other	Inactive
WELL A-11 - RAW	72378	Yes	Well	Ground water	Permanent	Active
WELL 07- RAW-INAC2022	57879	Yes	Well	Ground water	Other	Inactive
WELL 06 - RAW - INAC2022	57878	Yes	Well	Ground water	Other	Inactive
WELL 03 - DESTROYED IN 1991	18709	Yes	Well	Ground water	Other	Inactive
WELL 05 - RAW - INAC2022	11924	Yes	Well	Ground water	Other	Inactive
DISTRIBUTION SYSTEM	26015	No	Distribution System/Zone	-	-	Active
WELL A11-FEMN TRTMT W/ CL2	57880	No	Treatment Plant	-	-	Active
WELL 04 - CL2 - INAC2022	4995	No	Treatment Plant	-	-	Inactive
WELL 05 - CL2 - INAC2022	5009	No	Treatment Plant	-	-	Inactive

1 - 10 of 10

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL 04 - CL2 - INAC2022	4995	Hypochlorination, Post	Disinfection
WELL 05 - CL2 - INAC2022	5009	Hypochlorination, Post	Disinfection
WELL A11-FEMN TRTMT W/ CL2	57880	Hypochlorination, Post	Disinfection
WELL A11-FEMN TRTMT W/ CL2	57880	Coagulation	Inorganics removal
WELL A11-FEMN TRTMT W/ CL2	57880	Filtration, Greensand	Iron 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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