Non-Compliance
Clean Water Act
RCRA
SAN ONOFRE NUCLEAR GENERATING STATION UNIT 2
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $24,000 in total penalties since records began.
- Address
-
5000 OLD PACIFIC HWY
SAN CLEMENTE, CA 92672
View on map ↗ - County
- ORANGE County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221113
- Inspections
- 8 · last Nov 4, 2025
- Total Penalties
- $24,000 · last Aug 28, 2023
- Registry ID
- 110000915724
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
1
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
3
Hazardous Waste (RCRA)
Qtrs Non-Compliant
Qtrs Non-Compliant
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Nov 4, 2025 | Nov 17, 2025 | Resolved |
| rcra | EPA Administered Permit Programs: the HW Permit Program Permit Conditions | Nov 4, 2025 | Nov 18, 2025 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: Financial Requirements | Dec 5, 2023 | Jan 16, 2024 | Resolved |
| cwa | Effluent Violations - Unauthorized Discharge | Mar 25, 2020 | — | Open |
| rcra | State Statutory or Regulatory requirements that are broader-in-scope than the federal RCRA requirements | Sep 27, 2018 | Oct 11, 2018 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: General Facility Standards | Dec 16, 2003 | Dec 17, 2003 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: Financial Requirements | Feb 27, 2001 | Mar 12, 2002 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: Financial Requirements | Jul 6, 2000 | Aug 23, 2000 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: Financial Requirements | May 11, 2000 | Sep 18, 2000 | Resolved |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Oct 1, 1999 | — | Open |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Jul 28, 1999 | — | Open |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Jun 1, 1999 | — | Open |
| rcra | Standards Applicable to Generators of HW: General | May 27, 1998 | May 27, 1998 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | May 1, 1997 | Feb 9, 1998 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: Financial Requirements | May 1, 1997 | Feb 9, 1998 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: Financial Requirements | Apr 29, 1997 | May 29, 1997 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: General Facility Standards | Apr 29, 1997 | May 29, 1997 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Mar 8, 1994 | Apr 29, 1997 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Oct 16, 1992 | Mar 8, 1994 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | May 28, 1992 | Feb 1, 1995 | Resolved |
| rcra | Land Disposal Restrictions: General | May 28, 1992 | Feb 1, 1995 | Resolved |
| rcra | Standards for Owners and Operators of HW TSDs: General | May 28, 1992 | Feb 1, 1995 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Aug 20, 1991 | May 28, 1992 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jun 11, 1986 | Oct 20, 1986 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 64.10 deg F | 20.00 | +221% | Nov 2022 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 95.50 mg/L | 30.00 | +218% | Sep 2022 | Open |
| Oil and grease | DMR, Limited - Numeric Violation | 59.40 mg/L | 15.00 | +296% | Sep 2022 | Open |
| Oil and grease | DMR, Limited - Numeric Violation | 59.40 mg/L | 20.00 | +197% | Sep 2022 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 63.80 deg F | 20.00 | +219% | Oct 2021 | Open |
| Oil and grease | DMR, Limited - Numeric Violation | 42.00 mg/L | 20.00 | +110% | Jul 2019 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 2.38 kg/d | 0.64 | +274% | Dec 2016 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 23.61 kg/d | 5.45 | +333% | Dec 2016 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.04 kg/d | 0.02 | +80% | Dec 2016 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.04 kg/d | 0.02 | +72% | Dec 2016 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 23.61 kg/d | 0.64 | +3,614% | Dec 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 64.70 deg F | 20.00 | +224% | Nov 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 70.00 deg F | 20.00 | +250% | Oct 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 67.90 deg F | 20.00 | +240% | Sep 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 71.00 deg F | 20.00 | +255% | Aug 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 75.00 deg F | 20.00 | +275% | Jul 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 64.00 deg F | 20.00 | +220% | May 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 66.00 deg F | 20.00 | +230% | May 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 62.00 deg F | 20.00 | +210% | Apr 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 64.00 deg F | 20.00 | +220% | Apr 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 63.00 deg F | 20.00 | +215% | Feb 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 63.00 deg F | 20.00 | +215% | Feb 2016 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-542 · Jan 7, 2026
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-323 · Nov 4, 2025
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-320 · Dec 5, 2023
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-539 · Dec 5, 2023
State CWA Penalty AO
Clean Water Act
· Case CA-CFEA452512 · Aug 28, 2023
$24,000
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-528 · Nov 8, 2018
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-309 · Oct 4, 2018
SINGLE SITE CA/FO
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-216 · Mar 25, 2004
$163,498
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-508 · Feb 20, 2004
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-200 · Mar 15, 2001
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-505 · Mar 15, 2001
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-210 · Aug 9, 2000
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-501 · Aug 9, 2000
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-504 · Aug 9, 2000
SINGLE SITE CA/FO
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-217 · Jun 15, 1999
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-004 · May 27, 1998
INSPECTION REPORT w/VIOLATIONS (MAILED DATE)
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-516 · Aug 27, 1997
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-003 · May 1, 1997
FINAL CIVIL JUDICIAL ACTION FOR COMPLIANCE AND/OR MONETARY PENALTY
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-002 · Feb 1, 1995
$326,640
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-CAD000630921-001 · Jun 11, 1986
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