Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA3610034
PWS Name	ONTARIO MUNICIPAL UTILITIES COMPANY
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	185010
County Served	San Bernardino

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
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9313001	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
9513021	9313001	SOX	State Compliance achieved	15-SEP-1994	State	LTR FROM CITY NOT TO USE PLANT LTR DATED 09/15/94 FROM CITY NOT TO PERSUE TP IMPROVEMN

1 - 1 of 1

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CVWD - EMERGENCY - RECEIVE	68972	Yes	Consecutive Connection	Surface water	Emergency	Active
WELL 34 - INACTIVE	9992	Yes	Well	Ground water	Permanent	Inactive
WELL 37	9998	Yes	Well	Ground water	Permanent	Active
WELL 36	9996	Yes	Well	Ground water	Permanent	Active
WELL 43	67351	Yes	Well	Ground water	Permanent	Active
WELL NO. 47	45116	Yes	Well	Ground water	Permanent	Active
WELL NO. 46	45115	Yes	Well	Ground water	Permanent	Active
WELL NO. 45	45114	Yes	Well	Ground water	Permanent	Active
WELL 41 - RAW	10180	Yes	Well	Ground water	Permanent	Active
WELL 49	10179	Yes	Well	Ground water	Permanent	Active
WELL 44	10177	Yes	Well	Ground water	Permanent	Active
WELL 52	10176	Yes	Well	Ground water	Permanent	Active
WELL 24	10167	Yes	Well	Ground water	Permanent	Active
WELL 39	10163	Yes	Well	Ground water	Permanent	Active
WELL 40	10153	Yes	Well	Ground water	Permanent	Active
WELL 38	10019	Yes	Well	Ground water	Permanent	Active
WELL 35	10012	Yes	Well	Ground water	Permanent	Active
WELL 31	10005	Yes	Well	Ground water	Permanent	Active
WELL 29	10003	Yes	Well	Ground water	Permanent	Active
WELL 30	10002	Yes	Well	Ground water	Permanent	Active
WELL 19 - INACTIVE	CA3610034016	Yes	Well	Ground water	Other	Inactive
WELL 18 - INACTIVE	CA3610034015	Yes	Well	Ground water	Other	Inactive
WELL 16 - INACTIVE	CA3610034013	Yes	Well	Ground water	Other	Inactive
WELL 04 - INACTIVE	CA3610034003	Yes	Well	Ground water	Other	Inactive
WELL 03A - INACTIVE	CA3610034002	Yes	Well	Ground water	Other	Inactive
WELL 26 - DESTROYED 8/15/2023	9975	Yes	Well	Ground water	Other	Inactive
WELL 07 - ABANDONED	7355	Yes	Well	Ground water	Other	Inactive
WELL 33 - INACTIVE	20413	Yes	Well	Ground water	Other	Inactive
WELL 19 - DESTROYED 3/9/10	20405	Yes	Well	Ground water	Other	Inactive
WELL 18 - DESTROYED 8/3/08	20404	Yes	Well	Ground water	Other	Inactive
WELL 15 - DESTROYED 8/15/2023	20401	Yes	Well	Ground water	Other	Inactive
WELL 08 - DESTROYED	18044	Yes	Well	Ground water	Other	Inactive
WELL 05 - DESTROYED	18025	Yes	Well	Ground water	Other	Inactive
WELL 06 - DESTROYED	18023	Yes	Well	Ground water	Other	Inactive
WELL 28 - DESTROYED	18021	Yes	Well	Ground water	Other	Inactive
WELL 23 - DESTROYED	18020	Yes	Well	Ground water	Other	Inactive
WELL 21 - DESTROYED	18019	Yes	Well	Ground water	Other	Inactive
WELL 13 - DESTROYED	18017	Yes	Well	Ground water	Other	Inactive
WELL 10 - DESTROYED	18016	Yes	Well	Ground water	Other	Inactive
WELL 09 - INACTIVE	10181	Yes	Well	Ground water	Other	Inactive
WELL 50 - INACTIVE	10178	Yes	Well	Ground water	Other	Inactive
WELL 04 - DESTROYED 3/8/10	10173	Yes	Well	Ground water	Other	Inactive
WELL 11- DESTROYED 9/15/2023	10171	Yes	Well	Ground water	Other	Inactive
WELL 16 - DESTROYED 3/8/10	10170	Yes	Well	Ground water	Other	Inactive
WELL 17-MW CDA/IEUA -DESTROYED 12/19/23	10169	Yes	Well	Ground water	Other	Inactive
WELL 20 - INACTIVE	10168	Yes	Well	Ground water	Other	Inactive
WELL 03A - DESTROYED 3/12/10	10166	Yes	Well	Ground water	Other	Inactive
WELL 27 - INACTIVE	10103	Yes	Well	Ground water	Other	Inactive
WELL 25 - INACTIVE	10078	Yes	Well	Ground water	Other	Inactive
TREATMENT PLANT - RAW - INACTIVE	30670	Yes	Intake	Surface water	Other	Inactive

1 - 50 of 88

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
IX PLANT FINAL EFFLUENT	4172	Ion Exchange	Inorganics removal
IX PLANT FINAL EFFLUENT	4172	Rapid Mix	Inorganics removal
WELL 38 - TREATED	4183	Gaseous Chlorination, Pre	Disinfection
WELL NO. 45 - TREATED (CL2)	45117	Hypochlorination, Post	Disinfection
WELL NO. 46 - TREATED (CL2)	45118	Hypochlorination, Post	Disinfection
WELL NO. 47 - TREATED (CL2)	45119	Hypochlorination, Post	Disinfection
WELL 17 - TREATED (CL2) - DESTROYED	45319	Hypochlorination, Post	Disinfection
WELL 20 - TREATED (CL2) - INACTIVE	45320	Hypochlorination, Post	Disinfection
WELL 24 - TREATED (CL2)	45321	Hypochlorination, Post	Disinfection
WELL 25 - TREATED (CL2) - INACTIVE	45322	Hypochlorination, Post	Disinfection
WELL 26 - TREATED (CL2) - DESTROYED	45323	Hypochlorination, Post	Disinfection
WELL 27 - TREATED (CL2) - INACTIVE	45324	Hypochlorination, Post	Disinfection
WELL 29 - TREATED (CL2)	45325	Hypochlorination, Post	Disinfection
WELL 30 - TREATED (CL2)	45326	Hypochlorination, Post	Disinfection
WELL 31 - TREATED (CL2)	45327	Hypochlorination, Post	Disinfection
WELL 34 - TREATED (CL2) - INACTIVE	45328	Hypochlorination, Post	Disinfection
WELL 35 - TREATED (CL2)	45329	Hypochlorination, Post	Disinfection
WELL 36 - TREATED (CL2)	45330	Hypochlorination, Post	Disinfection
WELL 37 - TREATED (CL2) - INACTIVE	45331	Hypochlorination, Post	Disinfection
WELL 39 - TREATED (CL2) - INACTIVE	45332	Hypochlorination, Post	Disinfection
WELL 40 - TREATED (CL2)	45333	Hypochlorination, Post	Disinfection
WELL 41 - TREATED (CL2) - INACTIVE	45334	Hypochlorination, Post	Disinfection
WELL 49 - TREATED (CL2)	45335	Hypochlorination, Post	Disinfection
WELL 50 - TREATED (CL2) - INACTIVE	45336	Hypochlorination, Post	Disinfection
WELL 41 IX COMBINED VESSEL EFFLUENT	63197	Ion Exchange	Inorganics removal
WELL 41 IX FINISHED BLEND EFFLUENT	63198	Innovative	Inorganics removal
WELL 41 IX FINISHED BLEND EFFLUENT	63198	Hypochlorination, Post	Disinfection
WELL 37 AND 39 IX FINISHED BLEND EFF	74049	Hypochlorination, Post	Disinfection
WELL 37 AND 39 IX FINISHED BLEND EFF	74049	Ion Exchange	Inorganics removal
WELL 37 AND 39 IX FINISHED BLEND EFF	74049	Innovative	Inorganics removal
WELLS 37 AND 39 IX COMBINED VESSEL EFF	74050	Ion Exchange	Inorganics removal
WELL 43 - TREATED (CL2)	74147	Hypochlorination, Post	Disinfection

1 - 32 of 32

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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