Non-Compliance
Clean Water Act
SAN MARCOS WWTP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
HIGHWAY 123 AND INTERSTATE HIGHWAY 35
SAN MARCOS, TX 78666
View on map ↗ - County
- HAYS County
- Inspections
- 6 · last Nov 12, 2025
- Total Penalties
- $0 · last Sep 29, 2016
- Registry ID
- 110002044305
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.
12
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 achieved late but reported | Sep 30, 2024 | — | Open |
| cwa | Schedule Event achieved late but reported | Sep 30, 2022 | — | Open |
| cwa | Schedule Event achieved late but reported | Sep 30, 2021 | — | Open |
| cwa | Schedule Event achieved late but reported | Sep 30, 2016 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Dec 4, 2013 | — | Open |
| cwa | Schedule Event achieved late but reported | Aug 31, 2001 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Jun 24, 1997 | — | Open |
| cwa | Reporting Violations - Noncompliance with Section 308 Information Request | Sep 5, 1991 | — | Open |
| cwa | Permit Violations - CWA §308 Failure to submit required permit application information | Oct 31, 1990 | Aug 21, 1992 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | May 1, 1990 | Aug 21, 1992 | Resolved |
| cwa | Management Practice Violations - Failure to Develop/Enforce Standards | May 1, 1990 | Aug 21, 1992 | Resolved |
| cwa | Pretreatment - Failure to Establish Self-Monitoring Requirements | May 1, 1990 | Aug 21, 1992 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | May 1, 1990 | Aug 21, 1992 | Resolved |
| cwa | Pretreatment - Failure to Issue SIU Permits | Dec 31, 1989 | Aug 21, 1992 | Resolved |
| cwa | Pretreatment - Failure to Establish Self-Monitoring Requirements | Mar 1, 1989 | Aug 21, 1992 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Oct 10, 1988 | Aug 21, 1992 | Resolved |
| cwa | Schedule Event achieved late but reported | Jul 31, 1986 | — | Open |
| cwa | Schedule Event unachieved and not reported | Jul 31, 1986 | Nov 13, 1986 | Resolved |
| cwa | Schedule Event unachieved but reported | Jul 31, 1986 | Nov 13, 1986 | Resolved |
| cwa | Schedule Event achieved late but reported | Jul 31, 1986 | — | Open |
| cwa | Schedule Event unachieved and not reported | Apr 30, 1986 | Nov 13, 1986 | Resolved |
| cwa | Schedule Event achieved late but reported | Apr 30, 1986 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 31, 1986 | — | 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 | 134.23 MPN/100mL | 126.00 | +7% | Jan 2026 | Open |
| E. coli | DMR, Limited - Numeric Violation | 640.00 MPN/100mL | 399.00 | +60% | Dec 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 135.67 MPN/100mL | 126.00 | +8% | Dec 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 921.00 MPN/100mL | 399.00 | +131% | Nov 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 227.48 MPN/100mL | 126.00 | +81% | Nov 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 10.70 mg/L | 10.00 | +7% | Oct 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,076.00 MPN/100mL | 399.00 | +420% | Oct 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 2.86 mg/L | 2.00 | +43% | Oct 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.47 mg/L | 2.00 | +74% | Sep 2025 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 399.00 | +507% | Sep 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 4.52 mg/L | 2.00 | +126% | Aug 2025 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 6.31 mg/L | 4.00 | +58% | Aug 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 76.49 kg/d | 68.10 | +12% | Aug 2025 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 1.61 mg/L | 1.00 | +61% | Aug 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 14.90 mg/L | 10.00 | +49% | Aug 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 399.00 | +507% | Aug 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 28.00 mg/L | 20.00 | +40% | Aug 2025 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 1.13 mg/L | 1.00 | +13% | Jul 2025 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 399.00 | +507% | Jul 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 143.95 MPN/100mL | 126.00 | +14% | Jun 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 650.00 MPN/100mL | 399.00 | +63% | Jun 2025 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 34.50 kg/d | 34.05 | +1% | May 2025 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 1.67 mg/L | 1.00 | +67% | May 2025 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 136.00 MPN/100mL | 126.00 | +8% | Apr 2025 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 34.96 kg/d | 34.05 | +3% | Apr 2025 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 435.00 MPN/100mL | 399.00 | +9% | Apr 2025 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 1.59 mg/L | 1.00 | +59% | Apr 2025 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 1.58 mg/L | 1.00 | +58% | Mar 2025 | Resolved |
| Solids, total suspended | DMR, Limited - Numeric Violation | 172.52 kg/d | 170.25 | +1% | Feb 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 7.50 mg/L | 5.00 | +50% | Feb 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 60.00 mg/L | 20.00 | +200% | Feb 2025 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 4.80 mg/L | 4.00 | +20% | Feb 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 548.00 MPN/100mL | 399.00 | +37% | Dec 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 138.90 MPN/100mL | 126.00 | +10% | Dec 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.91 mg/L | 2.00 | +196% | Nov 2024 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 1,414.00 MPN/100mL | 399.00 | +254% | Nov 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 11.80 mg/L | 10.00 | +18% | Nov 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 173.66 MPN/100mL | 126.00 | +38% | Nov 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 116.81 kg/d | 68.10 | +72% | Nov 2024 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 165.14 MPN/100mL | 126.00 | +31% | Oct 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 103.27 kg/d | 68.10 | +52% | Oct 2024 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 649.00 MPN/100mL | 399.00 | +63% | Oct 2024 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 1.24 mg/L | 1.00 | +24% | Oct 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.66 mg/L | 2.00 | +183% | Oct 2024 | Resolved |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 1.44 mg/L | 1.00 | +44% | Sep 2024 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.40 mg/L | 2.00 | +170% | Sep 2024 | Resolved |
| E. coli | DMR, Limited - Numeric Violation | 154.08 MPN/100mL | 126.00 | +22% | Sep 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 551.00 MPN/100mL | 399.00 | +38% | Sep 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 10.90 mg/L | 10.00 | +9% | Sep 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 103.91 kg/d | 68.10 | +53% | Sep 2024 | 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.
Administrative - Formal
· Case 06-2025-1716 · Mar 3, 2025
State CWA Penalty AO
Clean Water Act
· Case TX-2015-1605-MWD-E · Sep 29, 2016
$9,000
Administrative - Formal
· Case 06-2016-1738 · Feb 26, 2016
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1998-N251 · Mar 3, 1998
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1991-N563 · Aug 8, 1991
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1991-N439 · May 22, 1991
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1985-N131 · Aug 30, 1985
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1985-N099 · May 28, 1985
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