Non-Compliance
Clean Water Act
MAYAGUEZ REGIONAL WASTEWATER TREATMENT PLANT
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
-
PR-342 KM 0.5
MAYAGUEZ, PR 00680
View on map ↗ - County
- MAYAGUEZ County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 22132
- Inspections
- 8 · last Sep 10, 2025
- Total Penalties
- $0 · last Aug 22, 2013
- Registry ID
- 110000906814
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 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | Mar 24, 2026 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | Mar 24, 2026 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Mar 6, 2026 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Feb 26, 2026 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Feb 7, 2026 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Feb 3, 2026 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Feb 2, 2026 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Jan 23, 2026 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Jan 5, 2026 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Dec 3, 2025 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Dec 2, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Dec 2, 2025 | — | Open |
| cwa | PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)] | Dec 1, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Nov 26, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Nov 25, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Nov 21, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Nov 21, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Nov 20, 2025 | — | Open |
| cwa | Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Nov 19, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Nov 13, 2025 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Nov 8, 2025 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Nov 8, 2025 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Nov 7, 2025 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Nov 5, 2025 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 21, 2025 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 7, 2025 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 2, 2025 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Oct 1, 2025 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Sep 24, 2025 | — | Open |
| cwa | Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Sep 23, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Sep 20, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Sep 19, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment | Sep 16, 2025 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Sep 4, 2025 | — | Open |
| cwa | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Aug 29, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Aug 23, 2025 | — | Open |
| cwa | Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Aug 19, 2025 | — | Open |
| cwa | Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangerment | Aug 12, 2025 | — | Open |
| cwa | Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | Aug 7, 2025 | — | Open |
| cwa | Management Practice Violations - Improper Operation and Maintenance | Jun 12, 2018 | — | Open |
| cwa | Schedule Event unachieved and not reported | Aug 31, 1995 | Dec 1, 2016 | Resolved |
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 |
|---|---|---|---|---|---|---|
| Cyanide, free available | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +42% | Dec 2024 | Open |
| BOD, 5-day, percent removal | DMR, Limited - Numeric Violation | 84.00 % | 85.00 | +7% | Aug 2024 | Open |
| Cyanide, free available | DMR, Limited - Numeric Violation | 0.01 mg/L | 0.01 | +1% | Aug 2023 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.60 mg/L | 0.50 | +20% | Feb 2023 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.93 mg/L | 0.01 | +12,300% | Jan 2023 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.93 mg/L | 0.01 | +12,300% | Dec 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.68 mg/L | 0.01 | +8,967% | Nov 2022 | Resolved |
| Cyanide, free available | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.01 | +123% | Oct 2022 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.18 mg/L | 0.01 | +2,313% | Oct 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.48 mg/L | 0.01 | +6,300% | Sep 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.56 mg/L | 0.01 | +7,367% | Aug 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.42 mg/L | 0.01 | +5,500% | Jul 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.88 mg/L | 0.01 | +11,633% | Jun 2022 | Resolved |
| Cyanide, free available | DMR, Limited - Numeric Violation | 0.01 mg/L | 0.01 | +1% | Jun 2022 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.83 mg/L | 0.01 | +10,967% | May 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.04 mg/L | 0.01 | +13,767% | Apr 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.38 mg/L | 0.01 | +4,967% | Mar 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.29 mg/L | 0.01 | +3,767% | Feb 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.31 mg/L | 0.01 | +4,033% | Jan 2022 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.25 mg/L | 0.01 | +3,233% | Dec 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.18 mg/L | 0.01 | +2,300% | Nov 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.20 mg/L | 0.01 | +2,567% | Oct 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.78 mg/L | 0.01 | +10,300% | Sep 2021 | Resolved |
| Cyanide, free available | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.01 | +183% | Sep 2021 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.71 mg/L | 0.01 | +22,700% | Aug 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.06 mg/L | 0.01 | +14,033% | Jul 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.50 mg/L | 0.01 | +19,900% | Jun 2021 | Resolved |
| Enterococci | DMR, Limited - Numeric Violation | 98.00 MPN/100mL | 35.00 | +180% | May 2021 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.07 mg/L | 0.01 | +14,167% | May 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.99 mg/L | 0.01 | +13,100% | Apr 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.08 mg/L | 0.01 | +14,300% | Mar 2021 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.30 mg/L | 0.01 | +17,233% | Feb 2021 | Resolved |
| BOD, 5-day, percent removal | DMR, Limited - Numeric Violation | 82.00 % | 85.00 | +20% | Feb 2021 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.85 mg/L | 0.01 | +11,233% | Jan 2021 | Resolved |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 24.00 mg/L | 21.97 | +9% | Jan 2021 | Open |
| BOD, 5-day, percent removal | DMR, Limited - Numeric Violation | 84.00 % | 85.00 | +7% | Jan 2021 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.99 mg/L | 0.01 | +13,100% | Dec 2020 | Resolved |
| BOD, 5-day, percent removal | DMR, Limited - Numeric Violation | 71.00 % | 85.00 | +93% | Dec 2020 | Open |
| Coliform, fecal - % samples exceeding limit | DMR, Limited - Numeric Violation | 60.00 % | 20.00 | +200% | Nov 2020 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 479.00 MPN/100mL | 200.00 | +140% | Nov 2020 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 32.00 mg/L | 30.00 | +7% | Nov 2020 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.84 mg/L | 0.01 | +11,100% | Nov 2020 | Resolved |
| Enterococci | DMR, Limited - Numeric Violation | 129.00 MPN/100mL | 35.00 | +269% | Oct 2020 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.49 mg/L | 0.01 | +6,433% | Oct 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.83 mg/L | 0.01 | +10,967% | Sep 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.47 mg/L | 0.01 | +6,167% | Aug 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.42 mg/L | 0.01 | +5,500% | Jul 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.33 mg/L | 0.01 | +4,300% | Jun 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.29 mg/L | 0.01 | +3,740% | May 2020 | Resolved |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 0.35 mg/L | 0.01 | +4,567% | Apr 2020 | 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.
Judicial
· Case 02-2011-0007 · May 23, 2016
Administrative - Formal
· Case 02-2016-3110 · Apr 13, 2016
Administrative - Formal
· Case 02-2014-3102 · Jan 29, 2014
Administrative - Formal
· Case 02-2012-1213 · Aug 22, 2013
$99,700
Administrative - Formal
· Case 02-2008-1214 · Aug 7, 2009
$95,000
Judicial
· Case 02-2004-0008 · Jan 10, 2007
$1,000,000
Administrative - Formal
· Case 02-2006-3023 · Nov 15, 2005
Administrative - Formal
· Case 02-2005-3262 · Sep 28, 2005
Administrative - Formal
· Case 02-2004-3098 · Sep 8, 2004
Administrative - Formal
· Case 02-2004-3094 · Sep 8, 2004
Administrative - Formal
· Case 02-2004-3083 · Aug 18, 2004
Judicial
· Case 02-2000-0004 · Jul 1, 2003
$1,000,000
Administrative - Formal
· Case 02-2002-3159 · Sep 30, 2002
Judicial
· Case 02-1999-0004 · May 10, 1999
$203,800
Judicial
· Case 02-1995-0065 · Jun 4, 1998
$150,000
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