Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA0410002
PWS Name	CAL-WATER SERVICE CO.-CHICO
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	114925
County Served	Butte

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)	221005	Returned to Compliance	01-SEP-2002	30-SEP-2002	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Volatile Organic Chemicals	Tetrachloroethylene	9921004	Returned to Compliance	01-DEC-1998	31-DEC-1998	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9321003	Returned to Compliance	01-NOV-1992	31-DEC-1992	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9321002	Returned to Compliance	01-OCT-1992	30-NOV-1992	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9221001	Returned to Compliance	01-SEP-1992	31-OCT-1992	Yes

1 - 5 of 5

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9921020	9921004	SOX	State Compliance achieved	27-FEB-2018	State	-
9921021	221005	SOX	State Compliance achieved	30-OCT-2002	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
9521010	9321002	SOX	State Compliance achieved	21-AUG-1995	State	ENF #9302001 - 2004 ARE OK
9521010	9221001	SOX	State Compliance achieved	21-AUG-1995	State	ENF #9302001 - 2004 ARE OK
9521010	9321003	SOX	State Compliance achieved	21-AUG-1995	State	ENF #9302001 - 2004 ARE OK

1 - 5 of 5

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 40-01 - STANDBY	10573	Yes	Well	Ground water	Emergency	Active
WELL 19-01	11863	Yes	Well	Ground water	Permanent	Inactive
WELL 22-01 - INACTIVE	11862	Yes	Well	Ground water	Permanent	Inactive
WELL 25-01 - INACTIVE	11615	Yes	Well	Ground water	Permanent	Inactive
WELL 68-01 - RAW XCLD	10619	Yes	Well	Ground water	Permanent	Inactive
WELL 47-01 - INACTIVE	10591	Yes	Well	Ground water	Permanent	Inactive
WELL 48-01 - PFOS	10590	Yes	Well	Ground water	Permanent	Inactive
WELL 63-01 - INACTIVE	10563	Yes	Well	Ground water	Permanent	Inactive
WELL 30-01 -INACTIVE	10536	Yes	Well	Ground water	Permanent	Inactive
WELL 09-03	63379	Yes	Well	Ground water	Permanent	Active
S4 EXTRACTION WELL (CH-W-S-04 -- PCE)	55307	Yes	Well	Ground water	Permanent	Active
S3 EXTRACTION WELL (CH-W-S-03 -- PCE)	55306	Yes	Well	Ground water	Permanent	Active
WELL 80-01	45737	Yes	Well	Ground water	Permanent	Active
WELL 23-01	11861	Yes	Well	Ground water	Permanent	Active
WELL 72-01	11860	Yes	Well	Ground water	Permanent	Active
WELL 21-01	11858	Yes	Well	Ground water	Permanent	Active
WELL 75-01	11857	Yes	Well	Ground water	Permanent	Active
WELL 20-01	11856	Yes	Well	Ground water	Permanent	Active
WELL 05-02	11847	Yes	Well	Ground water	Permanent	Active
WELL 76-01	11843	Yes	Well	Ground water	Permanent	Active
WELL 18-01	11841	Yes	Well	Ground water	Permanent	Active
WELL 79-01 RAW	11838	Yes	Well	Ground water	Permanent	Active
WELL 08-01	11837	Yes	Well	Ground water	Permanent	Active
WELL 11-01	11834	Yes	Well	Ground water	Permanent	Active
WELL 12-01	11833	Yes	Well	Ground water	Permanent	Active
WELL 16-01	11831	Yes	Well	Ground water	Permanent	Active
WELL 17-01	11830	Yes	Well	Ground water	Permanent	Active
WELL 70-01	11770	Yes	Well	Ground water	Permanent	Active
WELL 71-01	11758	Yes	Well	Ground water	Permanent	Active
WELL 26-01	11339	Yes	Well	Ground water	Permanent	Active
WELL 37-01	10666	Yes	Well	Ground water	Permanent	Active
S2 EXTRACTION WELL (CMW117B - HIGH PCE)	10664	Yes	Well	Ground water	Permanent	Active
WELL 67-01	10663	Yes	Well	Ground water	Permanent	Active
WELL 34-01	10662	Yes	Well	Ground water	Permanent	Active
WELL 35-01	10658	Yes	Well	Ground water	Permanent	Active
WELL 32-01	10640	Yes	Well	Ground water	Permanent	Active
S1 EXTRACTION WELL (CMW101B - HIGH PCE)	10638	Yes	Well	Ground water	Permanent	Active
WELL 49-01	10636	Yes	Well	Ground water	Permanent	Active
WELL 31-01	10627	Yes	Well	Ground water	Permanent	Active
WELL 33-01	10618	Yes	Well	Ground water	Permanent	Active
WELL 69-01	10615	Yes	Well	Ground water	Permanent	Active
WELL 53-01	10614	Yes	Well	Ground water	Permanent	Active
WELL 61-01	10609	Yes	Well	Ground water	Permanent	Active
WELL 59-01	10608	Yes	Well	Ground water	Permanent	Active
WELL 57-01	10605	Yes	Well	Ground water	Permanent	Active
WELL 56-01	10604	Yes	Well	Ground water	Permanent	Active
WELL 54-01	10601	Yes	Well	Ground water	Permanent	Active
WELL 44-01	10598	Yes	Well	Ground water	Permanent	Active
WELL 46-01	10597	Yes	Well	Ground water	Permanent	Active
WELL 52-01	10595	Yes	Well	Ground water	Permanent	Active

1 - 50 of 159

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL 76-01 CHLORINATED XCLD	4510	Hypochlorination, Pre	Disinfection
WELL 08-01 - CHLORINATED XCLD	4511	Hypochlorination, Post	Disinfection
WELL 40-01 - GAC	4512	Hypochlorination, Post	Disinfection
WELL 40-01 - GAC	4512	Activated Carbon, Granular	Organics removal
WELL 79-01 TREATED XCLD	4513	Hypochlorination, Pre	Disinfection
WELL 16-01 - AERATION	4514	Aeration, Packed Tower	Organics removal
WELL 16-01 - AERATION	4514	Hypochlorination, Post	Disinfection
WELL 46-01 - GAC	4515	Activated Carbon, Granular	Organics removal
WELL 46-01 - GAC	4515	Hypochlorination, Post	Disinfection
WELL 21-01 - GAC	4516	Activated Carbon, Granular	Organics removal
WELL 71-01 - CHLORINATED XCLD	4521	Hypochlorination, Post	Disinfection
WELL 18-01 - CHLORINATION XCLD	4532	Hypochlorination, Post	Disinfection
WELL 29-01 - CHLORINATION XCLD	4533	Hypochlorination, Post	Disinfection
WELL 28-01 - CHLORINATED XCLD	4534	Hypochlorination, Post	Disinfection
WELL 27-01 - CHLORINATED XCLD	4535	Hypochlorination, Post	Disinfection
WELL 26-01 - CHLORINATED XCLD	4536	Hypochlorination, Post	Disinfection
WELL 25-01 - CHLORINATED XCLD	4537	Hypochlorination, Post	Disinfection
WELL 24-01 - CHLORINATED XCLD	4538	Hypochlorination, Post	Disinfection
WELL 23-01 - CHLORINATED XCLD	4539	Hypochlorination, Post	Disinfection
WELL 22-01 - CHLORINATED XCLD	4540	Hypochlorination, Post	Disinfection
WELL 21-01 - CHLORINATION XCLD	4541	Hypochlorination, Post	Disinfection
WELL 75-01 - CHLORINATED XCLD	4542	Hypochlorination, Post	Disinfection
WELL 19-01 - CHLORINATED XCLD	4543	Hypochlorination, Post	Disinfection
WELL 70-01 - CHLORINATED XCLD	4544	Hypochlorination, Post	Disinfection
WELL 17-01 - CHLORINATED XCLD	4545	Hypochlorination, Post	Disinfection
WELL 14-01 - CHLORINATED XCLD	4546	Hypochlorination, Post	Disinfection
WELL 12-01 - CHLORINATED XCLD	4548	Hypochlorination, Post	Disinfection
WELL 11-01 - CHLORINATED XCLD	4549	Hypochlorination, Post	Disinfection
WELL 07-04 - CHLORINATED XCLD	4550	Hypochlorination, Post	Disinfection
WELL 05-02 - CHLORINATED XCLD	4551	Hypochlorination, Post	Disinfection
WELL 03-03 - CHLORINATED XCLD	4552	Hypochlorination, Post	Disinfection
WELL 72-01 - CHLORINATED XCLD	4553	Hypochlorination, Post	Disinfection
WELL 20-01 - CHLORINATION XCLD	4555	Hypochlorination, Post	Disinfection
WELL 80-01 - CHLORINATED XCLD	45738	Hypochlorination, Post	Disinfection
WELL 32-01 - CHLORINATION XCLD	4581	Hypochlorination, Post	Disinfection
WELL 30-01 - CHLORINATION XCLD	4626	Hypochlorination, Post	Disinfection
WELL 47-01 - CHLORINATED XCLD	4652	Hypochlorination, Post	Disinfection
WELL 59-01 - CHLORINATED XCLD	4654	Hypochlorination, Post	Disinfection
WELL 57-01 - CHLORINATED XCLD	4655	Hypochlorination, Post	Disinfection
WELL 56-01 - CHLORINATED XCLD	4656	Hypochlorination, Post	Disinfection
WELL 54-01 - CHLORINATED XCLD	4657	Hypochlorination, Post	Disinfection
WELL 53-01 - CHLORINATED XCLD	4658	Hypochlorination, Post	Disinfection
WELL 52-01 - GAC DEAD	4659	Hypochlorination, Post	Disinfection
WELL 51-01 - CHLORINATED XCLD	4660	Hypochlorination, Post	Disinfection
WELL 50-01 - CHLORINATED XCLD	4661	Hypochlorination, Post	Disinfection
WELL 62-01 - CHLORINATED XCLD	4662	Hypochlorination, Post	Disinfection
WELL 48-01 - CHLORINATED XCLD	4663	Hypochlorination, Post	Disinfection
WELL 63-01 - CHLORINATED XCLD	4664	Hypochlorination, Post	Disinfection
WELL 44-01 - CHLORINATED XCLD	4665	Hypochlorination, Post	Disinfection
WELL 42-01 - CHLORINATED XCLD	4666	Hypochlorination, Post	Disinfection

1 - 50 of 68

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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