Non-Compliance
Clean Water Act
CITY OF MERCEDES WWTP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $18,750 in total penalties since records began.
- Address
-
S INTX MILE 1/2 E RD & N 8 MIL
MERCEDES, TX 78570
View on map ↗ - County
- HIDALGO County
- Inspections
- 4 · last Jan 28, 2026
- Total Penalties
- $18,750 · last May 26, 2021
- Registry ID
- 110039881740
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.
3
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 | Nov 9, 2022 | Oct 27, 2023 | Resolved |
| cwa | Schedule Event unachieved but reported | Oct 3, 2021 | Aug 30, 2023 | Resolved |
| cwa | Schedule Event achieved late but reported | Oct 3, 2021 | — | Open |
| cwa | Schedule Event reported late | Oct 3, 2021 | — | Open |
| cwa | Schedule Event unachieved and not reported | Oct 3, 2021 | Aug 30, 2023 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Jul 15, 2021 | Oct 5, 2021 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Jul 6, 2021 | Oct 29, 2021 | Resolved |
| cwa | Schedule Event unachieved and not reported | Apr 10, 2020 | May 26, 2021 | Resolved |
| cwa | Schedule Event reported late | Apr 10, 2020 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 10, 2020 | — | Open |
| cwa | Schedule Event unachieved but reported | Apr 10, 2020 | May 26, 2021 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Mar 11, 2020 | Apr 26, 2024 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Apr 12, 2018 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Sep 28, 2016 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Dec 11, 2014 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jul 10, 1996 | Dec 9, 1996 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Sep 28, 1994 | Apr 4, 1995 | Resolved |
| cwa | Permit Violations - CWA §308 Failure to submit required permit application information | Dec 30, 1992 | Nov 8, 1993 | Resolved |
| cwa | Reporting Violations - Noncompliance with Section 308 Information Request | Sep 5, 1991 | — | Open |
| cwa | Effluent Violations - Unapproved Bypass | May 22, 1990 | — | Open |
| cwa | Effluent Violations - Unapproved Bypass | Mar 30, 1990 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | May 3, 1989 | — | 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 |
|---|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 18.26 MGD | 15.00 | +22% | Mar 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 549.30 MPN/100mL | 399.00 | +38% | Mar 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 18.80 mg/L | 7.00 | +169% | May 2023 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 8.00 mg/L | 7.00 | +14% | May 2022 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.20 mg/L | 2.00 | +60% | May 2022 | Resolved |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 7.84 mg/L | 7.00 | +12% | Apr 2022 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 53.71 kg/d | 37.68 | +43% | Apr 2022 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 15.80 mg/L | 7.00 | +126% | Apr 2022 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9.05 mg/L | 2.00 | +353% | Apr 2022 | Resolved |
| Solids, total suspended | DMR, Limited - Numeric Violation | 57.00 mg/L | 40.00 | +43% | Jul 2021 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 82.00 mg/L | 40.00 | +105% | Jun 2021 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 23.10 mg/L | 15.00 | +54% | Jun 2021 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 8.00 mg/L | 7.00 | +14% | Jul 2020 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.80 mg/L | 6.00 | +20% | Jun 2019 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 25.00 mg/L | 22.00 | +14% | Jun 2019 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 46.00 mg/L | 22.00 | +109% | Apr 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 15.00 mg/L | 7.00 | +114% | Apr 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.50 mg/L | 2.00 | +75% | Apr 2019 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 26.80 mg/L | 7.00 | +283% | Mar 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 49.03 kg/d | 37.68 | +30% | Mar 2019 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 7.90 mg/L | 2.00 | +295% | Mar 2019 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 15.50 mg/L | 7.00 | +121% | Feb 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 8.20 mg/L | 7.00 | +17% | Nov 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 8.40 mg/L | 7.00 | +20% | Jul 2018 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,011.00 MPN/100mL | 399.00 | +153% | Jun 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 2.80 mg/L | 2.00 | +40% | Mar 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9.60 mg/L | 7.00 | +37% | Mar 2018 | Open |
| E. coli | DMR, Limited - Numeric Violation | 549.00 MPN/100mL | 399.00 | +38% | Feb 2018 | Open |
| E. coli | DMR, Limited - Numeric Violation | 420.00 MPN/100mL | 399.00 | +5% | Oct 2016 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,011.00 MPN/100mL | 399.00 | +153% | Oct 2015 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 7.70 mg/L | 7.00 | +10% | Jan 2015 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,011.00 MPN/100mL | 399.00 | +153% | Jan 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 TX-2019-1101-MWD-E · May 26, 2021
$18,750
Administrative - Formal
· Case 06-2020-1733 · Mar 10, 2020
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1996-N291 · Sep 27, 1996
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1995-N209 · Feb 22, 1995
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1993-N450 · Apr 22, 1993
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1990-N366 · Sep 24, 1990
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1989-N442 · Jun 1, 1989
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1989-N434 · May 3, 1989
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