Non-Compliance
Clean Water Act
DISCOVERY BAY WWTP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $6,000 in total penalties since records began.
- Address
-
HIGHWAY 4 AND CHANNEL ROAD
DISCOVERY BAY, CA 94514
View on map ↗ - County
- CONTRA COSTA County
- Inspections
- 2 · last Nov 13, 2023
- Total Penalties
- $6,000 · last Sep 24, 2024
- Registry ID
- 110001103911
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.
6
Water (CWA)
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 | Permit Violations - Violation Specified in Comment | Feb 23, 2018 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jan 9, 2018 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Feb 19, 2003 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Feb 5, 2003 | — | Open |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Jan 31, 2003 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jan 22, 2003 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jun 14, 2000 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Mar 8, 2000 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Feb 2, 2000 | — | Open |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Jan 21, 2000 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jan 19, 2000 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Nov 26, 1999 | — | 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 |
|---|---|---|---|---|---|---|
| %Effect Static 4 Day Chronic Raphidocelis subcapitata | DMR, Limited - Numeric Violation | 100.00 % | 50.00 | +99,999% | Dec 2025 | Open |
| %Effect Static 4 Day Chronic Raphidocelis subcapitata | DMR, Limited - Numeric Violation | 100.00 % | 50.00 | +100% | Sep 2025 | Open |
| Coliform, total general | DMR, Limited - Numeric Violation | 7.80 MPN/100mL | 2.20 | +255% | Jul 2024 | Open |
| Coliform, total general | DMR, Limited - Numeric Violation | 36.00 MPN/100mL | 2.20 | +1,536% | Apr 2024 | Open |
| Coliform, total general | DMR, Limited - Numeric Violation | 350.00 MPN/100mL | 240.00 | +46% | Nov 2023 | Open |
| BOD, 5-day, percent removal | DMR, Limited - Numeric Violation | 9.40 % | 85.00 | +504% | Jan 2023 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 48.60 deg F | 20.00 | +143% | Jan 2022 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 54.90 deg F | 20.00 | +175% | Dec 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 75.00 deg F | 20.00 | +275% | Sep 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 76.80 deg F | 20.00 | +284% | Aug 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 75.70 deg F | 20.00 | +279% | Jul 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 69.30 deg F | 20.00 | +247% | Jun 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 68.40 deg F | 20.00 | +242% | May 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 66.50 deg F | 20.00 | +233% | Apr 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 61.70 deg F | 20.00 | +209% | Mar 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 49.60 deg F | 20.00 | +148% | Feb 2021 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 58.60 deg F | 20.00 | +193% | Jan 2021 | Open |
| Diazinon + Chlorpyrifos | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.00 | +5,300% | Dec 2020 | Open |
| Diazinon + Chlorpyrifos | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.00 | +5,300% | Dec 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 82.80 deg F | 20.00 | +314% | Nov 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 72.00 deg F | 20.00 | +260% | Sep 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 75.00 deg F | 20.00 | +275% | Aug 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 74.70 deg F | 20.00 | +274% | Jul 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 75.00 deg F | 20.00 | +275% | Jun 2020 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 68.20 deg F | 20.00 | +241% | May 2020 | Open |
| Specific conductance | DMR, Limited - Numeric Violation | 2,285.00 umho/cm | 2,100.00 | +9% | Dec 2019 | Open |
| Specific conductance | DMR, Limited - Numeric Violation | 2,174.00 umho/cm | 2,100.00 | +4% | Dec 2018 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 33.50 mg/L | 31.00 | +8% | Dec 2018 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Overdue | 33.50 mg/L | 31.00 | +8% | Dec 2018 | Resolved |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 73.90 deg F | 20.00 | +270% | Sep 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 76.30 deg F | 20.00 | +282% | Aug 2018 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 35.00 mg/L | 31.00 | +13% | Jul 2018 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 32.00 mg/L | 31.00 | +3% | Jun 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 68.00 deg F | 20.00 | +240% | Apr 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 61.30 deg F | 20.00 | +207% | Feb 2018 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 68.00 deg F | 20.00 | +240% | Nov 2017 | Open |
| Coliform, total general | DMR, Limited - Numeric Violation | 30.00 MPN/100mL | 23.00 | +30% | Sep 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 75.40 deg F | 20.00 | +277% | Aug 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 77.00 deg F | 20.00 | +285% | Jun 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 66.00 deg F | 20.00 | +230% | Apr 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 64.20 deg F | 20.00 | +221% | Feb 2017 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 62.20 deg F | 20.00 | +211% | Dec 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 71.00 deg F | 20.00 | +255% | Nov 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 76.80 deg F | 20.00 | +284% | Jul 2016 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 31.80 mg/L | 31.00 | +3% | Jun 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 74.00 deg F | 20.00 | +270% | May 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 62.00 deg F | 20.00 | +210% | Feb 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 59.00 deg F | 20.00 | +195% | Jan 2016 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 67.00 deg F | 20.00 | +235% | Nov 2015 | Open |
| Temperature, water deg. fahrenheit | DMR, Limited - Numeric Violation | 70.00 deg F | 20.00 | +250% | May 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.
State CWA Penalty AO
Clean Water Act
· Case CA-N00001618
State CWA Penalty AO
Clean Water Act
· Case CA-N00003731
State CWA Penalty AO
Clean Water Act
· Case CA-CFEA457543 · Sep 24, 2024
$6,000
State CWA Penalty AO
Clean Water Act
· Case CA-CFEA425652 · Oct 11, 2018
$3,000
State CWA Penalty AO
Clean Water Act
· Case CA-CFEA419879 · Mar 5, 2018
State CWA Penalty AO
Clean Water Act
· Case CA-2013-1047 · Sep 13, 2013
$19,500
State CWA Penalty AO
Clean Water Act
· Case CA-2009-1131 · Apr 20, 2012
$231,000
State CWA Penalty AO
Clean Water Act
· Case CA-2011-1063 · Jan 28, 2011
$1,000,000
State CWA Penalty AO
Clean Water Act
· Case CA-2009-1089 · Mar 30, 2009
State CWA Non Penalty AO
Clean Water Act
· Case CA-N00001017 · Apr 25, 2003
State CWA Non Penalty AO
Clean Water Act
· Case CA-N00002511 · Jun 11, 1999
State CWA Non Penalty AO
Clean Water Act
· Case CA-N00001627 · Oct 27, 1989
State CWA Non Penalty AO
Clean Water Act
· Case CA-N00000319 · Sep 23, 1988
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