Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA5710001
PWS Name	CITY OF DAVIS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	67457
County Served	Yolo

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, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	509004	Returned to Compliance	01-MAR-2005	30-APR-2005	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9609003	Returned to Compliance	01-JAN-1996	31-JAN-1996	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	9009001	Returned to Compliance	01-JAN-1990	31-DEC-1994	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	9000188	Known	01-DEC-1989	31-DEC-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	9000187	Known	01-NOV-1989	30-NOV-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	9000186	Known	01-OCT-1989	31-OCT-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8908037	Known	01-SEP-1989	30-SEP-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8908036	Known	01-AUG-1989	31-AUG-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8908035	Known	01-JUL-1989	31-JUL-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8908034	Known	01-JUN-1989	30-JUN-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8908033	Known	01-MAY-1989	31-MAY-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8908032	Known	01-APR-1989	30-APR-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900408	Known	01-MAR-1989	31-MAR-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900407	Known	01-FEB-1989	28-FEB-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900406	Known	01-JAN-1989	31-JAN-1989	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900637	Known	01-DEC-1988	31-DEC-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900636	Known	01-NOV-1988	30-NOV-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900635	Known	01-OCT-1988	31-OCT-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900634	Known	01-SEP-1988	30-SEP-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900633	Known	01-AUG-1988	31-AUG-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900632	Known	01-JUL-1988	31-JUL-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900631	Known	01-JUN-1988	30-JUN-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900630	Known	01-MAY-1988	31-MAY-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900629	Known	01-APR-1988	30-APR-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900628	Known	01-MAR-1988	31-MAR-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900627	Known	01-FEB-1988	29-FEB-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8900626	Known	01-JAN-1988	31-JAN-1988	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8800141	Known	01-DEC-1987	31-DEC-1987	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8800140	Known	01-NOV-1987	30-NOV-1987	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8800139	Known	01-OCT-1987	31-OCT-1987	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8700971	Known	01-SEP-1987	30-SEP-1987	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8700970	Known	01-AUG-1987	31-AUG-1987	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8700969	Known	01-JUL-1987	31-JUL-1987	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8700628	Known	01-JUN-1987	30-JUN-1987	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	Selenium	8700627	Known	01-MAY-1987	31-MAY-1987	Yes

1 - 35 of 35

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9709009	509004	SOX	State Compliance achieved	30-MAY-2005	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
9709008	9009001	SOX	State Compliance achieved	01-JAN-1997	State	-
9709010	9609003	SOX	State Compliance achieved	29-FEB-1996	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
88E0002	8900626	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8800141	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8800140	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8800139	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8900627	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8900631	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8900630	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8900628	SO6	State Intentional no-action	30-SEP-1988	State	-
88E0002	8900629	SO6	State Intentional no-action	30-SEP-1988	State	-
87E0002	8700969	SO6	State Intentional no-action	30-SEP-1987	State	-
87E0002	8700970	SO6	State Intentional no-action	30-SEP-1987	State	-
87E0002	8700971	SO6	State Intentional no-action	30-SEP-1987	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
UCD/DAVIS INTERTIE - RUSSELL AND CA	54524	Yes	Consecutive Connection	Ground water	Emergency	Active
WELL 19	14542	Yes	Well	Ground water	Permanent	Inactive
WELL EM3	14540	Yes	Well	Ground water	Permanent	Inactive
WELL 28	14539	Yes	Well	Ground water	Permanent	Inactive
WELL 27	14538	Yes	Well	Ground water	Permanent	Inactive
WELL 25	14537	Yes	Well	Ground water	Permanent	Inactive
WELL 26	14536	Yes	Well	Ground water	Permanent	Inactive
WELL 23	14534	Yes	Well	Ground water	Permanent	Inactive
WELL 22	14533	Yes	Well	Ground water	Permanent	Inactive
WELL 20	14531	Yes	Well	Ground water	Permanent	Inactive
WELL 15	14529	Yes	Well	Ground water	Permanent	Inactive
WELL 14	14528	Yes	Well	Ground water	Permanent	Inactive
WELL 11	14527	Yes	Well	Ground water	Permanent	Inactive
WELL 07	14526	Yes	Well	Ground water	Permanent	Inactive
WELL 01 NEW	14525	Yes	Well	Ground water	Permanent	Inactive
WELL 21	14521	Yes	Well	Ground water	Permanent	Inactive
WELL 34 - RAW	45671	Yes	Well	Ground water	Permanent	Active
WELL 32 - RAW	24078	Yes	Well	Ground water	Permanent	Active
WELL 24	14535	Yes	Well	Ground water	Permanent	Active
WELL 33 (LEWIS) - RAW	14524	Yes	Well	Ground water	Permanent	Active
WELL 31	14523	Yes	Well	Ground water	Permanent	Active
WELL 30	14522	Yes	Well	Ground water	Permanent	Active
WELL 29 - TREATED	CA5710001054	Yes	Well	Ground water	Other	Inactive
WELL 29 (DESTROYED)	24077	Yes	Well	Ground water	Other	Inactive
WELL EM2 - OFFLINE (NITRATES) XCLD	22065	Yes	Well	Ground water	Other	Inactive
WELL EM1 - DESTROYED XCLD	19608	Yes	Well	Ground water	Other	Inactive
HUNT-WESSON - DESTROYED XCLD	19606	Yes	Well	Ground water	Other	Inactive
WELL 18 - DESTROYED XCLD	19602	Yes	Well	Ground water	Other	Inactive
WELL 17 - DESTROYED XCLD	19601	Yes	Well	Ground water	Other	Inactive
WELL 16 - DESTROYED XCLD	19600	Yes	Well	Ground water	Other	Inactive
WELL 13 - DESTROYED XCLD	19598	Yes	Well	Ground water	Other	Inactive
WELL 12 - DESTROYED XCLD	19597	Yes	Well	Ground water	Other	Inactive
WELL 10 - DESTROYED XCLD	19596	Yes	Well	Ground water	Other	Inactive
WELL 06 - DESTROYED XCLD	19595	Yes	Well	Ground water	Other	Inactive
WELL 01 - DESTROYED XCLD	19593	Yes	Well	Ground water	Other	Inactive
WELL 29 (DESTROYED)	14733	Yes	Well	Ground water	Other	Inactive
UCD/DAVIS INTERTIE - 1ST AND B ST	68134	Yes	Consecutive Connection	Ground water	Emergency	Active
WDCWA - SOURCE INTERTIE	70381	Yes	Consecutive Connection	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	34263	No	Distribution System/Zone	-	-	Active
WELL 24 - TREATED XCLD	2066	No	Treatment Plant	-	-	Active
WELL 31 - TREATED XCLD	2077	No	Treatment Plant	-	-	Active
WELL 30 - TREATED XCLD	2078	No	Treatment Plant	-	-	Active
WELL 33 (LEWIS) - TREATED XCLD	2079	No	Treatment Plant	-	-	Active
WELL 32 - TREATED OTHR	55102	No	Treatment Plant	-	-	Active
WELL 34 - TREATED	67067	No	Treatment Plant	-	-	Active
WELL EM3 - TREATED XCLD	2013	No	Treatment Plant	-	-	Inactive
WELL 28 - TREATED XCLD	2014	No	Treatment Plant	-	-	Inactive
WELL 27 - TREATED XCLD	2015	No	Treatment Plant	-	-	Inactive
WELL 25 - TREATED XCLD	2051	No	Treatment Plant	-	-	Inactive
WELL 01 NEW - TREATED XCLD	2064	No	Treatment Plant	-	-	Inactive

1 - 50 of 62

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL EM3 - TREATED XCLD	2013	Hypochlorination, Post	Disinfection
WELL 28 - TREATED XCLD	2014	Hypochlorination, Post	Disinfection
WELL 27 - TREATED XCLD	2015	Hypochlorination, Post	Disinfection
WELL 25 - TREATED XCLD	2051	Hypochlorination, Post	Disinfection
WELL 01 NEW - TREATED XCLD	2064	Hypochlorination, Post	Disinfection
WELL 26 - TREATED XCLD	2065	Hypochlorination, Post	Disinfection
WELL 24 - TREATED XCLD	2066	Hypochlorination, Post	Disinfection
WELL 23 - TREATED XCLD	2067	Hypochlorination, Post	Disinfection
WELL 22 - TREATED XCLD	2068	Hypochlorination, Post	Disinfection
WELL 21 - TREATED XCLD	2069	Hypochlorination, Post	Disinfection
WELL 20 - TREATED XCLD	2070	Hypochlorination, Post	Disinfection
WELL 19 - TREATED XCLD	2071	Hypochlorination, Post	Disinfection
WELL 15 - TREATED XCLD	2072	Hypochlorination, Post	Disinfection
WELL 14 - TREATED XCLD	2073	Hypochlorination, Post	Disinfection
WELL 07 - TREATED XCLD	2075	Hypochlorination, Post	Disinfection
WELL 31 - TREATED XCLD	2077	Hypochlorination, Post	Disinfection
WELL 30 - TREATED XCLD	2078	Hypochlorination, Post	Disinfection
WELL 33 (LEWIS) - TREATED XCLD	2079	Hypochlorination, Post	Disinfection
WELL 11 - TREATED XCLD	2086	Hypochlorination, Post	Disinfection
WELL 32 - TREATED OTHR	55102	Hypochlorination, Post	Disinfection
WELL 32 - TREATED OTHR	55102	Filtration, Greensand	Iron removal
WELL 32 - TREATED OTHR	55102	Filtration, Greensand	Manganese removal
WELL 32 - TREATED OTHR	55102	Filtration, Pressure Sand	Inorganics removal
WELL 34 - TREATED	67067	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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