Non-Compliance
Clean Water Act
RCRA
IRONHOUSE SD WWTP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $3,000 in total penalties since records began.
- Address
-
450 WALNUT MEADOWS
OAKLEY, CA 94561
View on map ↗ - County
- CONTRA COSTA County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 22132
- Inspections
- 2 · last Dec 31, 2024
- Total Penalties
- $3,000 · last Aug 18, 2025
- Registry ID
- 110037253281
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.
7
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
0
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 |
|---|---|---|---|---|
| cwa | PR: Biosolids - Land Application: Applied to Land at Greater than the Agronomic Rate Violation (001) | Jan 1, 2024 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Dec 31, 2021 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Dec 5, 2019 | — | Open |
| cwa | PR: Biosolids - Land Application: Invalid Monitoring or Unrepresentative Sample Violation | Jan 1, 2017 | — | Open |
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 |
|---|---|---|---|---|---|---|
| Copper, total [as Cu] | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.02 | +26% | Sep 2025 | Open |
| Coliform, total general | DMR, Limited - Numeric Violation | 6.80 MPN/100mL | 2.20 | +209% | Apr 2024 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 87.80 deg F | 20.00 | +339% | Jul 2023 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 80.00 deg F | 20.00 | +300% | Nov 2021 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 0.70 kg/d | 14.53 | +99,999% | May 2021 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 0.71 kg/d | 27.69 | +99,999% | May 2021 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.02 | +181% | Apr 2021 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.04 | +41% | Apr 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 80.70 deg F | 20.00 | +304% | Nov 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 83.80 deg F | 20.00 | +319% | Sep 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 77.20 deg F | 20.00 | +286% | Apr 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 80.30 deg F | 20.00 | +302% | Feb 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 77.70 deg F | 20.00 | +289% | Sep 2019 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 83.70 deg F | 20.00 | +319% | Aug 2019 | Open |
| Coliform, total general | DMR, Limited - Numeric Violation | 6.15 MPN/100mL | 2.20 | +180% | Mar 2019 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 79.20 deg F | 20.00 | +296% | Oct 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 84.50 deg F | 20.00 | +323% | Aug 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 85.30 deg F | 20.00 | +327% | Jun 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 77.60 deg F | 20.00 | +288% | Apr 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 75.60 deg F | 20.00 | +278% | Dec 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 80.20 deg F | 20.00 | +301% | Nov 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 74.10 deg F | 20.00 | +271% | Apr 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 67.80 deg F | 20.00 | +239% | Feb 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 67.60 deg F | 20.00 | +238% | Jan 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 69.40 deg F | 20.00 | +247% | Dec 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 74.20 deg F | 20.00 | +271% | Apr 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 70.50 deg F | 20.00 | +253% | Mar 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 74.10 deg F | 20.00 | +271% | Feb 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 68.30 deg F | 20.00 | +242% | Jan 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 73.70 deg F | 20.00 | +269% | Nov 2015 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 78.90 deg F | 20.00 | +295% | Oct 2015 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 11.00 mg/L | 10.00 | +10% | Apr 2015 | 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.
Administrative - Formal
· Case 07-2025-0102 · Aug 18, 2025
$1,500
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