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PWS ID	CA2810004
PWS Name	ST. HELENA, CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	5386
County Served	Napa

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	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503017	Known	01-JUL-2023	30-SEP-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503016	Known	01-APR-2023	30-JUN-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503015	Known	01-JAN-2023	31-MAR-2023	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	9503018	Open	01-OCT-2022	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503009	Known	01-JAN-2021	31-MAR-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503011	Known	01-JAN-2021	31-MAR-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503010	Known	01-JAN-2021	31-MAR-2021	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9503007	Returned to Compliance	01-NOV-2020	30-NOV-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503008	Known	01-OCT-2020	31-DEC-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503006	Returned to Compliance	01-JAN-2017	31-MAR-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503005	Returned to Compliance	01-OCT-2016	31-DEC-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9503004	Returned to Compliance	01-JUL-2016	30-SEP-2016	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9503003	Returned to Compliance	01-FEB-1995	28-FEB-1995	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9303002	Returned to Compliance	01-JUN-1993	30-JUN-1993	Yes

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9503014	9503008	SFL	State Administrative/Compliance Order without penalty issued	23-MAR-2021	State	-
9503014	9503009	SFL	State Administrative/Compliance Order without penalty issued	23-MAR-2021	State	-
9503014	9503010	SFL	State Administrative/Compliance Order without penalty issued	23-MAR-2021	State	-
9503014	9503011	SFL	State Administrative/Compliance Order without penalty issued	23-MAR-2021	State	-
9503014	9503015	SFL	State Administrative/Compliance Order without penalty issued	23-MAR-2021	State	-
9503014	9503016	SFL	State Administrative/Compliance Order without penalty issued	23-MAR-2021	State	-
9503014	9503017	SFL	State Administrative/Compliance Order without penalty issued	23-MAR-2021	State	-
9503013	9503007	SOX	State Compliance achieved	10-DEC-2020	State	resolved TT viol; no chlorine residual quickly
9503010	9503004	SOX	State Compliance achieved	21-DEC-2017	State	DBP Compliant
9503011	9503006	SOX	State Compliance achieved	21-DEC-2017	State	dbp compliant
9503009	9503005	SOX	State Compliance achieved	19-JAN-2017	State	compliance with 3Q 2016 DBP MCL
9503006	9503003	SOX	State Compliance achieved	27-FEB-1995	State	ENF_NO:02-03-95C-046;
9503007	9303002	SOX	State Compliance achieved	29-MAR-1993	State	ENF_NO:CO 02-070;

1 - 13 of 13

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CITY OF NAPA INTERTIE	29421	Yes	Consecutive Connection	Surface water	Permanent	Active
SPRING STREET WELL - PRIVATE AG WELL	8489	Yes	Well	Ground water	Permanent	Inactive
BARTALUCCI WELL - PRIVATE AG WELL	8485	Yes	Well	Ground water	Permanent	Inactive
STONEBRIDGE WELL 01	12386	Yes	Well	Ground water	Permanent	Active
STONEBRIDGE WELL 02	12384	Yes	Well	Ground water	Permanent	Active
OLD AG WELL (INACTIVE)	64339	Yes	Well	Ground water	Other	Inactive
POPE STREET WELL - INACTIVE	21879	Yes	Well	Ground water	Other	Inactive
BELL CANYON WELL 01	29418	Yes	Intake	Surface water	Permanent	Active
LOWER RESERVOIR INTAKE - INACTIVE	29420	Yes	Intake	Surface water	Other	Inactive
DISTRIBUTION SYSTEM	29419	No	Distribution System/Zone	-	-	Active
LOUIS STRALLA BOOSTER PS	65009	No	Pump Facility	-	-	Active
INLINE BOOSTER	65010	No	Pump Facility	-	-	Active
HOLMES PUMP STATION	65012	No	Pump Facility	-	-	Active
SPRING MTN PUMP STATION	65013	No	Pump Facility	-	-	Active
MADRONE KNOLL PUMP STN	65014	No	Pump Facility	-	-	Active
RUTHERFORD PUMP STN	65018	No	Pump Facility	-	-	Active
TANK 1A (1.4 MG)	65008	No	Storage	-	-	Active
TANK 2 (2.7 MG)	65011	No	Storage	-	-	Active
MEADOWOOD TANK 1 (WEST)	65015	No	Storage	-	-	Active
MEADOWOOD TANK 2 (MID)	65016	No	Storage	-	-	Active
MEADOWOOD TANK 3 (EAST)	65017	No	Storage	-	-	Active
HOLMES TANK (60K)	65019	No	Storage	-	-	Active
LOUIS A STRALLA WATER TREATMENT PLANT	1710	No	Treatment Plant	-	-	Active
STONEBRIDGE WATER TREATMENT PLANT	5834	No	Treatment Plant	-	-	Active
RUTHERFORD WTP	74665	No	Treatment Plant	-	-	Active

1 - 25 of 25

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Inhibitor, Orthophosphate	Corrosion control
LOUIS A STRALLA WATER TREATMENT PLANT	1710	pH Adjustment, Post	Corrosion control
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Hypochlorination, Post	Disinfection
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Filtration, Rapid Sand	Particulate removal
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Sedimentation	Particulate removal
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Flocculation	Particulate removal
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Permanganate	Iron removal
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Rapid Mix	Particulate removal
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Coagulation	Particulate removal
LOUIS A STRALLA WATER TREATMENT PLANT	1710	Hypochlorination, Pre	Disinfection
STONEBRIDGE WATER TREATMENT PLANT	5834	Filtration, Greensand	Manganese removal
STONEBRIDGE WATER TREATMENT PLANT	5834	Filtration, Greensand	Iron removal
STONEBRIDGE WATER TREATMENT PLANT	5834	Hypochlorination, Pre	Disinfection
RUTHERFORD WTP	74665	Hypochlorination, Post	Disinfection

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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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