Non-Compliance
Clean Water Act
SAN MATEO WWTF
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
-
2050 DETROIT DRIVE
SAN MATEO, CA 94404
View on map ↗ - County
- SAN MATEO County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221320
- Inspections
- 2 · last Dec 31, 2024
- Total Penalties
- $6,000 · last Apr 4, 2025
- Registry ID
- 110056000857
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.
5
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 | Dec 23, 2021 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Dec 16, 2021 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Oct 25, 2021 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jun 18, 2021 | — | 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 |
|---|---|---|---|---|---|---|
| Chlorine, total residual | DMR, Limited - Overdue | 0.55 mg/L | 0.34 | +62% | Feb 2024 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.55 mg/L | 0.34 | +62% | Feb 2024 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.56 mg/L | 0.00 | +2,147,483,650% | Nov 2023 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.25 mg/L | 0.00 | +2,147,483,650% | Oct 2023 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.35 mg/L | 0.00 | +2,147,483,650% | Sep 2023 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.00 | +2,147,483,650% | Jun 2023 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.85 mg/L | 0.00 | +2,147,483,650% | Jul 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 27.40 mg/L | 25.00 | +10% | Jul 2022 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 41.50 mg/L | 30.00 | +38% | Jul 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 15.50 mg/L | 15.00 | +3% | Jun 2022 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 20.30 mg/L | 20.00 | +2% | Jun 2020 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 39.60 mg/L | 30.00 | +32% | Jun 2020 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 39.90 MPN/100mL | 200.00 | +99,999% | Aug 2017 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.80 mg/L | 0.00 | +2,147,483,650% | Apr 2017 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 4.15 mg/L | 0.00 | +2,147,483,650% | Dec 2016 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.75 mg/L | 0.00 | +2,147,483,650% | Dec 2015 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.90 mg/L | 0.00 | +2,147,483,650% | Aug 2015 | Resolved |
| % Survival Flow Through 96Hr Acute Oncorhynchus mykiss | DMR, Limited - Numeric Violation | 100.00 % | 70.00 | +99,999% | Mar 2015 | Open |
| % Survival Flow Through 96Hr Acute Oncorhynchus mykiss | DMR, Limited - Numeric Violation | 100.00 % | 90.00 | +99,999% | Mar 2015 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 500.00 MPN/100mL | 400.00 | +25% | Feb 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-N00001041
State CWA Penalty AO
Clean Water Act
· Case CA-N00001094
State CWA Penalty AO
Clean Water Act
· Case CA-N00004035
State CWA Penalty AO
Clean Water Act
· Case CA-N00001040
State CWA Penalty AO
Clean Water Act
· Case CA-CFEA459540 · Apr 4, 2025
$6,000
State CWA Penalty AO
Clean Water Act
· Case CA-CFEA455312 · Mar 5, 2024
State CWA Non Penalty AO
Clean Water Act
· Case CA-2009-1016 · Mar 11, 2009
State CWA Penalty AO
Clean Water Act
· Case CA-2009-1107 · Mar 11, 2009
State CWA Non Penalty AO
Clean Water Act
· Case CA-N00004193 · Nov 1, 2007
State CWA Penalty AO
Clean Water Act
· Case CA-N00000259 · Jul 26, 1991
State CWA Non Penalty AO
Clean Water Act
· Case CA-N00001095 · Jun 3, 1983
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