Non-Compliance
Clean Water Act
CITY OF MASON WWTP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $19,250 in total penalties since records began.
- Address
-
.75MI NE INTX USHWY 87/FM 1723
MASON, TX 76856
View on map ↗ - County
- MASON County
- Inspections
- 1 · last Mar 10, 2025
- Total Penalties
- $19,250 · last Aug 22, 2023
- Registry ID
- 110009746695
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.
11
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 | Schedule Event unachieved but reported | Dec 30, 2023 | Oct 31, 2025 | Resolved |
| cwa | Schedule Event achieved late but reported | Dec 30, 2023 | — | Open |
| cwa | Schedule Event reported late | Dec 30, 2023 | — | Open |
| cwa | Schedule Event unachieved and not reported | Dec 30, 2023 | Oct 31, 2025 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Jul 20, 2020 | Oct 16, 2020 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Oct 24, 2017 | — | Open |
| cwa | Schedule Event unachieved but reported | Jun 14, 2016 | — | Open |
| cwa | Schedule Event achieved late but reported | Jun 14, 2016 | — | Open |
| cwa | Schedule Event reported late | Jun 14, 2016 | — | Open |
| cwa | Schedule Event unachieved and not reported | Jun 14, 2016 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Feb 17, 2016 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jan 28, 2014 | — | 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 |
|---|---|---|---|---|---|---|
| E. coli | DMR, Limited - Numeric Violation | 1,733.00 MPN/100mL | 126.00 | +1,275% | Nov 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,776.00 MPN/100mL | 399.00 | +345% | Nov 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 816.00 MPN/100mL | 126.00 | +548% | Jul 2025 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.44 MGD | 0.26 | +70% | Jul 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 816.00 MPN/100mL | 399.00 | +105% | Jul 2025 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.16 mg/L | 4.00 | +21% | Jul 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 127.00 MPN/100mL | 126.00 | +1% | Jun 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 130.00 MPN/100mL | 126.00 | +3% | May 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6.37 mg/L | 4.00 | +59% | Feb 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.69 mg/L | 4.00 | +42% | Feb 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Overdue | 6.97 mg/L | 4.00 | +74% | Mar 2023 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6.97 mg/L | 4.00 | +74% | Mar 2023 | Resolved |
| E. coli | DMR, Limited - Overdue | 294.40 MPN/100mL | 126.00 | +134% | Feb 2023 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 866.00 MPN/100mL | 399.00 | +117% | Feb 2023 | Open |
| E. coli | DMR, Limited - Numeric Violation | 294.40 MPN/100mL | 126.00 | +134% | Feb 2023 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 8.40 mg/L | 4.00 | +110% | Feb 2023 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 40.26 kg/d | 29.51 | +36% | Jan 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Overdue | 40.26 kg/d | 29.51 | +36% | Jan 2023 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Overdue | 38.20 mg/L | 30.00 | +27% | Jan 2023 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 38.20 mg/L | 30.00 | +27% | Jan 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 30.75 mg/L | 30.00 | +3% | Dec 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 579.00 MPN/100mL | 399.00 | +45% | Nov 2022 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.31 MGD | 0.26 | +19% | Nov 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 221.00 MPN/100mL | 126.00 | +75% | Nov 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 34.00 mg/L | 30.00 | +13% | Apr 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 172.00 MPN/100mL | 126.00 | +37% | Dec 2021 | Open |
| E. coli | DMR, Limited - Numeric Violation | 248.00 MPN/100mL | 126.00 | +97% | Nov 2021 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 10.70 mg/L | 4.00 | +168% | Mar 2021 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 173.00 MPN/100mL | 126.00 | +37% | Mar 2021 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.50 mg/L | 4.00 | +13% | Mar 2021 | Open |
| E. coli | DMR, Limited - Numeric Violation | 649.00 MPN/100mL | 399.00 | +63% | Mar 2021 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.58 kg/d | 3.95 | +41% | Mar 2021 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 7.08 kg/d | 3.95 | +79% | Feb 2021 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 11.00 mg/L | 4.00 | +175% | Feb 2021 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 36.00 mg/L | 30.00 | +20% | Feb 2021 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 4.30 mg/L | 4.00 | +8% | Jan 2021 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 31.00 mg/L | 30.00 | +3% | Dec 2020 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 17.60 mg/L | 15.00 | +17% | Feb 2020 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9.22 kg/d | 5.45 | +69% | Feb 2020 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 16.00 mg/L | 4.00 | +300% | Feb 2020 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 7.31 kg/d | 5.45 | +34% | Jan 2020 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 12.10 mg/L | 4.00 | +203% | Jan 2020 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.49 kg/d | 5.45 | +1% | Apr 2019 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 16.80 mg/L | 15.00 | +12% | Apr 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 13.30 mg/L | 4.00 | +233% | Apr 2019 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 19.50 mg/L | 15.00 | +30% | Mar 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 17.00 mg/L | 4.00 | +325% | Mar 2019 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6.76 kg/d | 5.45 | +24% | Mar 2019 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 134.00 MPN/100mL | 126.00 | +6% | Mar 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.72 kg/d | 5.45 | +5% | Feb 2019 | Resolved |
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 TX-2021-0836-MWD-E · Aug 22, 2023
$19,250
State CWA Penalty AO
Clean Water Act
· Case TX-2020-0266-MWD-E · Aug 4, 2020
$3,500
State CWA Penalty AO
Clean Water Act
· Case TX-2015-0529-MWD-E · Dec 17, 2015
$28,500
State CWA Non Penalty AO
Clean Water Act
· Case TX-N00004068 · Aug 5, 2001
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