Non-Compliance
Clean Water Act
NORTHWEST WWTP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $4,400,000 in total penalties since records began.
- Address
-
5423 MANGUM RD
HOUSTON, TX 77091
View on map ↗ - County
- HARRIS County
- Inspections
- 6 · last Jun 5, 2025
- Total Penalties
- $4,400,000 · last Apr 1, 2021
- Registry ID
- 110010922948
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.
1
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 | Jun 5, 2025 | Jun 9, 2025 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | May 23, 2025 | May 27, 2025 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | Jul 10, 2024 | Jul 31, 2024 | Resolved |
| cwa | Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Jul 9, 2024 | Jul 31, 2024 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Oct 30, 2023 | Aug 31, 2024 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 19, 2023 | Sep 30, 2024 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Oct 15, 2023 | Aug 31, 2024 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 14, 2022 | Sep 30, 2023 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Oct 1, 2022 | Sep 30, 2023 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Sep 28, 2022 | Sep 30, 2022 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Sep 14, 2022 | Sep 30, 2022 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Feb 3, 2022 | Sep 30, 2022 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Jan 4, 2022 | Sep 30, 2022 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Oct 3, 2021 | Dec 31, 2021 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 3, 2021 | Dec 31, 2021 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Jun 17, 2021 | Aug 25, 2021 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Jun 11, 2021 | Sep 10, 2021 | Resolved |
| cwa | Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | May 24, 2021 | May 24, 2021 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Apr 14, 2021 | May 21, 2021 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | Apr 6, 2021 | Apr 6, 2021 | Resolved |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Nov 17, 2020 | Dec 28, 2020 | Resolved |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 7, 2020 | Jun 30, 2021 | Resolved |
| cwa | WW SSO - Discharge to Waters | Apr 29, 2020 | — | Open |
| cwa | WW SSO - Discharge to Waters | Mar 30, 2020 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Jan 19, 2020 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | Oct 9, 2019 | — | Open |
| cwa | WW SSO - Overflow to Dry Land or Building Backup | Sep 26, 2019 | — | Open |
| cwa | WW SSO - Discharge to Waters | May 26, 2018 | — | Open |
| cwa | WW SSO - Discharge to Waters | Oct 1, 2015 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Feb 19, 2015 | — | Open |
| cwa | WW SSO - Overflow to Dry Land or Building Backup | Oct 1, 2014 | — | Open |
| cwa | WW SSO - Discharge to Waters | Oct 1, 2014 | — | Open |
| cwa | WW SSO - Discharge to Waters | Jan 1, 2003 | — | Open |
| cwa | Schedule Event achieved late but reported | Sep 20, 2002 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Feb 22, 2000 | Jan 13, 2003 | Resolved |
| cwa | Effluent Violations - Numeric effluent violation | May 3, 1995 | Aug 31, 1998 | Resolved |
| cwa | Management Practice Violations - Improper Operation and Maintenance | May 3, 1995 | Aug 31, 1998 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Nov 29, 1994 | Jan 25, 1996 | Resolved |
| cwa | Effluent Violations - Unapproved Bypass | Aug 24, 1994 | May 3, 1995 | Resolved |
| cwa | Effluent Violations - Unapproved Bypass | Aug 26, 1993 | Aug 24, 1994 | Resolved |
| cwa | Effluent Violations - Unapproved Bypass | Nov 6, 1991 | Sep 7, 1993 | Resolved |
| cwa | Reporting Violations - Noncompliance with Section 308 Information Request | Sep 5, 1991 | — | Open |
| cwa | Schedule Event achieved late but reported | Nov 15, 1988 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 20, 1988 | — | Open |
| cwa | Schedule Event achieved late but reported | Jun 13, 1988 | — | 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 | 1,120.00 MPN/100mL | 200.00 | +460% | Aug 2025 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,410.00 MPN/100mL | 200.00 | +605% | Nov 2024 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 58.00 mg/L | 25.00 | +99,999% | Jul 2024 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 60.00 mg/L | 40.00 | +50% | Jul 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 18.00 mg/L | 10.00 | +80% | Jul 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 242,000.00 MPN/100mL | 200.00 | +99,999% | Jul 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,300.00 MPN/100mL | 200.00 | +550% | Jun 2024 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 22.00 mg/L | 25.00 | +99,999% | May 2024 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 84.00 mg/L | 40.00 | +110% | May 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 16.00 mg/L | 10.00 | +60% | Mar 2024 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 22.00 mg/L | 25.00 | +99,999% | Mar 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 251.97 kg/d | 204.30 | +23% | Mar 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 7.00 mg/L | 3.00 | +133% | Mar 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,410.00 MPN/100mL | 200.00 | +605% | Jan 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 200.00 | +99,999% | Oct 2023 | Open |
| E. coli | DMR, Limited - Numeric Violation | 272.00 MPN/100mL | 200.00 | +36% | Jul 2023 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,990.00 MPN/100mL | 200.00 | +895% | Jun 2023 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 200.00 | +1,110% | May 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 12.00 mg/L | 25.00 | +99,999% | Apr 2023 | Open |
| E. coli | DMR, Limited - Numeric Violation | 345.00 MPN/100mL | 200.00 | +73% | Mar 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 11.00 mg/L | 25.00 | +99,999% | Dec 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,200.00 MPN/100mL | 200.00 | +500% | Nov 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 13.00 mg/L | 25.00 | +99,999% | Oct 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 200.00 | +1,110% | Apr 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 435.00 MPN/100mL | 200.00 | +118% | Feb 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 12.00 mg/L | 25.00 | +99,999% | Jan 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 12,100.00 MPN/100mL | 200.00 | +99,999% | May 2021 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 12.00 mg/L | 10.00 | +20% | Feb 2021 | Open |
| E. coli | DMR, Limited - Numeric Violation | 4,839.00 MPN/100mL | 200.00 | +99,999% | Sep 2020 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 41.00 mg/L | 40.00 | +3% | Jan 2020 | Open |
| E. coli | DMR, Limited - Numeric Violation | 488.00 MPN/100mL | 200.00 | +144% | Jan 2020 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 12.00 mg/L | 25.00 | +99,999% | Apr 2018 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 91.00 mg/L | 40.00 | +128% | Mar 2016 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 34.00 mg/L | 25.00 | +36% | Mar 2016 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 19.00 mg/L | 15.00 | +27% | Feb 2016 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 8.00 mg/L | 3.00 | +167% | Feb 2016 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 200.00 | +99,999% | Feb 2016 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 252.88 kg/d | 204.30 | +24% | Feb 2016 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 99.00 mg/L | 40.00 | +148% | Feb 2016 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 15.00 mg/L | 10.00 | +50% | Feb 2016 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 150.00 mg/L | 40.00 | +275% | Jan 2016 | Open |
| E. coli | DMR, Limited - Numeric Violation | 1,730.00 MPN/100mL | 200.00 | +765% | Dec 2015 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 200.00 | +99,999% | Oct 2015 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 200.00 | +99,999% | Jun 2015 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 200.00 | +99,999% | May 2015 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 42.00 mg/L | 40.00 | +5% | Apr 2015 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 45.00 mg/L | 40.00 | +13% | Mar 2015 | Open |
| E. coli | DMR, Limited - Numeric Violation | 579.00 MPN/100mL | 200.00 | +190% | 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.
Judicial
· Case 06-2010-1780 · Apr 1, 2021
$4,400,000
CWA 309A AO For Compliance
Clean Water Act
· Case 06-2002-N141 · Aug 20, 2002
CWA 309A AO For Compliance
Clean Water Act
· Case 06-2002-N289 · Aug 14, 2002
CWA 309A AO For Compliance
Clean Water Act
· Case 06-2001-N552 · May 18, 2001
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1995-N218 · May 23, 1995
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1995-N416 · May 3, 1995
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1994-N499 · Aug 24, 1994
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1993-N293 · Aug 26, 1993
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1992-N389 · Nov 6, 1991
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1989-N327 · Jul 20, 1989
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1988-N333 · Sep 27, 1988
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1988-N296 · Sep 20, 1988
CWA 309A AO For Compliance
Clean Water Act
· Case 06-1988-N375 · May 25, 1988
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