Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA3310037
PWS Name	CORONA, CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	169380
County Served	Riverside

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
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9820009	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	9820008	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	9820014	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	9820013	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	9820012	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	9820072	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	9820071	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	9820070	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	9820069	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	9820068	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	9820067	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	9820066	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	9820065	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	9820064	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	9820063	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	9820062	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	9820061	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	9820060	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	9820059	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	9820058	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	9820057	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	9820056	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	9820055	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	9820054	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	9820053	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	9820052	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	9820022	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	9820021	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	9820020	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	9820080	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	9820028	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	9820027	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	9820077	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	9820076	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	9820075	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	9820023	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Nitrate Rule	Nitrite	9820019	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	9820018	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	9820017	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	9820016	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	9820074	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	9820073	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	9820079	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	9820051	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	9820050	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	9820049	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	9820048	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	9820047	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	9820045	Returned to Compliance	01-JAN-2017	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	9820044	Returned to Compliance	01-JAN-2017	31-DEC-2025	No

1 - 50 of 87

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9520012	9820012	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820013	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820014	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820015	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820016	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820017	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820018	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820019	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820020	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820021	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820022	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820023	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820027	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820028	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820031	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820032	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820033	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820034	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820035	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820036	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820038	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820039	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820040	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820041	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820042	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820043	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820044	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820045	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820047	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820048	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820049	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820050	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820051	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820052	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820053	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820054	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820055	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820056	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820057	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820058	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820059	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820060	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820061	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820062	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820063	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820064	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820065	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820066	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820067	SOX	State Compliance achieved	11-MAR-2026	State	-
9520012	9820068	SOX	State Compliance achieved	11-MAR-2026	State	-

1 - 50 of 75

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
PROMENADE CONNECTION	57515	Yes	Consecutive Connection	Ground water	Permanent	Active
WELL 33 (IXTP SUPPLY)	64873	Yes	Well	Ground water	Permanent	Active
WELL 11A (MANGULAR SUPPLY)	45110	Yes	Well	Ground water	Permanent	Active
WELL 31 (DESALTER SUPPLY)	23912	Yes	Well	Ground water	Permanent	Active
WELL 29 - (DESALTER SUPPLY)	23910	Yes	Well	Ground water	Permanent	Active
WELL 15 (MANGULAR SUPPLY)	10788	Yes	Well	Ground water	Permanent	Active
WELL 14 (MANGULAR SUPPLY)	10787	Yes	Well	Ground water	Permanent	Active
WELL 09A (DESALTER SUPPLY)	10784	Yes	Well	Ground water	Permanent	Active
WELL 28 - (DESALTER SUPPLY)	10779	Yes	Well	Ground water	Permanent	Active
WELL 19 (DESALTER SUPPLY)	10768	Yes	Well	Ground water	Permanent	Active
WELL 25 (DESALTER SUPPLY)	10767	Yes	Well	Ground water	Permanent	Active
WELL 22 (DESALTER SUPPLY)	10763	Yes	Well	Ground water	Permanent	Active
WELL 08A (IX SUPPLY)	10761	Yes	Well	Ground water	Permanent	Active
WELL 26 (DESALTER SUPPLY)	10760	Yes	Well	Ground water	Permanent	Active
WELL 17A (IX SUPPLY)	10758	Yes	Well	Ground water	Permanent	Active
WELL 12A (MANGULAR SUPPLY)	10741	Yes	Well	Ground water	Permanent	Active
WELL 31 - PENDING	CA3310037055	Yes	Well	Ground water	Other	Inactive
WELL 30 - PENDING	CA3310037053	Yes	Well	Ground water	Other	Inactive
WELL 18 - DESTROYED	8470	Yes	Well	Ground water	Other	Inactive
WELL 01 - ABANDONED	7654	Yes	Well	Ground water	Other	Inactive
WELL 02 - ABANDONED	7653	Yes	Well	Ground water	Other	Inactive
WELL 06 - ABANDONED	7652	Yes	Well	Ground water	Other	Inactive
WELL 10 - ABANDONED	7651	Yes	Well	Ground water	Other	Inactive
WELL 17 - ABANDONED	7649	Yes	Well	Ground water	Other	Inactive
BLANK	66046	Yes	Well	Ground water	Other	Inactive
WELL 32 - INACTIVE	64872	Yes	Well	Ground water	Other	Inactive
WELL 08 - INACTIVE	24324	Yes	Well	Ground water	Other	Inactive
WELL 30 - MW	23911	Yes	Well	Ground water	Other	Inactive
WELL 04 - INACTIVE	20727	Yes	Well	Ground water	Other	Inactive
WELL 09 - DESTROYED	18346	Yes	Well	Ground water	Other	Inactive
WELL 07 - DESTROYED	18345	Yes	Well	Ground water	Other	Inactive
WELL 12 - DESTROYED	18343	Yes	Well	Ground water	Other	Inactive
WELL 05 - DESTROYED	18333	Yes	Well	Ground water	Other	Inactive
WELL 16 - INACTIVE	10789	Yes	Well	Ground water	Other	Inactive
WELL 13 - INACTIVE	10785	Yes	Well	Ground water	Other	Inactive
WELL 20 - INACTIVE	10782	Yes	Well	Ground water	Other	Inactive
DFA WELL - PRIVATE - INACTIVE	10780	Yes	Well	Ground water	Other	Inactive
WELL 27 (MANGULAR SUPPLY) - INACTIVE	10778	Yes	Well	Ground water	Other	Inactive
WELL 11 - INACTIVE	10776	Yes	Well	Ground water	Other	Inactive
WELL 24 - DESTROYED	10775	Yes	Well	Ground water	Other	Inactive
WELL 07A (DESALTER SUPPLY)	10730	Yes	Well	Ground water	Other	Inactive
WELL 23 - DESTROYED	10764	Yes	Well	Ground water	Emergency	Inactive
WELL 03 - STANDBY	10791	Yes	Well	Ground water	Emergency	Active
WELL 21 - STANDBY	10762	Yes	Well	Ground water	Emergency	Active
LAKE MATTHEWS - RAW (SR-3)	30243	Yes	Consecutive Connection	Surface water	Permanent	Active
LESTER SWTP INFLUENT - RAW (SR-1)	30244	Yes	Consecutive Connection	Surface water	Permanent	Active
PURCHASED - MILLS - MWDTRTD	30245	Yes	Consecutive Connection	Surface water	Permanent	Active
SIERRA DEL ORO SWTP INFLNT-RAW (SR-2)	30246	Yes	Consecutive Connection	Surface water	Permanent	Active
TEMESCAL DESALTER INFLUENT - RAW (SL-1)	30247	No	Common Headers	-	-	Active
CITY PARK GAC – PLANT INFLUENT (SR-4)	64880	No	Common Headers	-	-	Active

1 - 50 of 77

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
R-3 BLEND (SB-9) - INACTIVE	4558	Rapid Mix	Inorganics removal
MANGULAR BLEND (SB-10)	4559	Rapid Mix	Inorganics removal
SIERRA DEL ORO EFFLUENT - TREATED	4560	Filtration, Rapid Sand	Particulate removal
LESTER ZONE 3 BLEND (SB-6) - TREATED	4561	Rapid Mix	Inorganics removal
LESTER ZONE 4 BLEND (SB-7)	4562	Rapid Mix	Inorganics removal
LESTER ZONE 5 BLEND (SB-8)	4563	Rapid Mix	Inorganics removal
ONTARIO BOOSTER BLEND (SB-5) - INACTIVE	4564	Rapid Mix	Inorganics removal
LESTER SWTP EFFLUENT - TREATED	4565	Hypochlorination, Pre	Disinfection
LESTER SWTP EFFLUENT - TREATED	4565	Chloramines	Disinfection by-products control
LESTER SWTP EFFLUENT - TREATED	4565	4-Log Remove/Inactivate Viruses	Disinfection
LESTER SWTP EFFLUENT - TREATED	4565	Filtered	Particulate removal
GARRETSON ZONE 3 (SB-13)	53307	Rapid Mix	Inorganics removal
GARRETSON ZONE 4 (SB-14)	53308	Rapid Mix	Inorganics removal
SDO BLEND (SB-15)	53309	Rapid Mix	Inorganics removal
TAYLOR BOOSTER STATION (SB-12)-INACTIVE	53317	Rapid Mix	Inorganics removal
WELL 11A - CHLORAMINATION STATION	53356	Chloramines	Disinfection
TEMESCAL DESALTER PROD 6TH/MERILL(SB-2)	5672	Rapid Mix	Inorganics removal
10TH STREET BLEND (SB-4) W19 - INACTIVE	5673	Rapid Mix	Inorganics removal
10TH STREET BLEND (SB-3) W6,7,8,17-INAC	5674	Rapid Mix	Inorganics removal
PROMENADE - CHLORAMINATION TP	57583	Chloramines	Disinfection
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	Distillation	Inorganics removal
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	pH Adjustment	Corrosion control
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	Aeration, Packed Tower	Corrosion control
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	Chloramines	Disinfection
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	Rapid Mix	Inorganics removal
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	pH Adjustment, Post	Corrosion control
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	Reverse Osmosis	Inorganics removal
TEMESCAL DESALTER EFFLUENT (SB-1) TRTD	6119	Filtration, Cartridge	Particulate removal
WELLS 12 & 16 BLEND (SB-11) - INACTIVE	6129	Rapid Mix	Inorganics removal
COMBINED GAC LAG VESSEL EFFLUENT (SS-4)	64881	Activated Carbon, Granular	Inorganics removal
CITY PARK GAC BLENDED PRODUCT - SB-16	65899	Innovative	Inorganics removal
BLENDED PRODUCT - SB-16 CHLORAMINE	66606	Chloramines	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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