Non-Compliance
Clean Water Act
NOGALES INTERNATIONAL 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
-
865 RIO RICO INDUSTRIAL PARK
RIO RICO, AZ 85648
View on map ↗ - County
- SANTA CRUZ County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 22132
- Inspections
- 4 · last Jan 30, 2025
- Total Penalties
- $0 · last Jun 19, 2006
- Registry ID
- 110028190419
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 | Aug 31, 2023 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Mar 8, 2022 | — | Open |
| cwa | Reporting Violations - Failure to Submit DMRs | Jun 19, 2020 | — | Open |
| cwa | Monitoring Violations - Analysis not Conducted | Aug 20, 2019 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Apr 22, 2019 | — | Open |
| cwa | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | Feb 7, 2018 | — | Open |
| cwa | Reporting Violations - Failure to Notify | Feb 7, 2018 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Feb 7, 2018 | — | Open |
| cwa | Effluent Violations - Narrative Effluent Violation | Aug 1, 2017 | — | Open |
| cwa | Effluent Violations - Unauthorized Discharge | Aug 1, 2017 | — | Open |
| cwa | Effluent Violations - Numeric effluent violation | Aug 1, 2017 | — | Open |
| cwa | Schedule Event unachieved and not reported | Jan 21, 2011 | Feb 20, 2011 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 21, 2011 | Apr 21, 2011 | Resolved |
| cwa | Schedule Event achieved late but reported | Dec 22, 2010 | — | Open |
| cwa | Schedule Event unachieved and not reported | Dec 22, 2010 | Mar 17, 2011 | Resolved |
| cwa | Schedule Event unachieved and not reported | Dec 22, 2010 | Jan 21, 2011 | Resolved |
| cwa | Schedule Event unachieved and not reported | Dec 7, 2010 | Jan 6, 2011 | Resolved |
| cwa | Schedule Event unachieved and not reported | Dec 6, 2010 | Oct 24, 2011 | Resolved |
| cwa | Schedule Event achieved late but reported | Dec 6, 2010 | — | 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 |
|---|---|---|---|---|---|---|
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.66 mg/L | 0.22 | +205% | Dec 2025 | Resolved |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | DMR, Limited - Numeric Violation | 2.00 toxic | 1.60 | +25% | Dec 2025 | Open |
| Silver total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.02 | +60% | Dec 2025 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +17% | Dec 2025 | Open |
| Chromium, total recoverable | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.01 | +141% | Dec 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.11 mg/L | 0.10 | +7% | Dec 2025 | Open |
| Cadmium, total recoverable | DMR, Limited - Numeric Violation | 0.01 mg/L | 0.00 | +286% | Dec 2025 | Open |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | DMR, Limited - Numeric Violation | 1.50 toxic | 1.00 | +50% | Dec 2025 | Open |
| Lead, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +67% | Dec 2025 | Resolved |
| Lead, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +67% | Sep 2025 | Resolved |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.48 mg/L | 0.22 | +121% | Sep 2025 | Resolved |
| Cyanide, total [as CN] | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.04 | +39% | Sep 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.58 mg/L | 0.10 | +464% | Sep 2025 | Resolved |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +250% | Sep 2025 | Open |
| Nickel, total recoverable | DMR, Limited - Numeric Violation | 0.15 mg/L | 0.11 | +33% | Sep 2025 | Resolved |
| Chromium, total recoverable | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.01 | +310% | Sep 2025 | Resolved |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.60 mg/L | 0.22 | +176% | Jun 2025 | Resolved |
| Cyanide, total [as CN] | DMR, Limited - Numeric Violation | 0.07 mg/L | 0.04 | +66% | Jun 2025 | Resolved |
| Chromium, total recoverable | DMR, Limited - Numeric Violation | 0.25 mg/L | 0.01 | +1,729% | Jun 2025 | Resolved |
| Nickel, total recoverable | DMR, Limited - Numeric Violation | 0.29 mg/L | 0.11 | +158% | Jun 2025 | Resolved |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.30 mg/L | 0.10 | +192% | Jun 2025 | Resolved |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.85 mg/L | 0.22 | +291% | Mar 2025 | Open |
| Chromium, total recoverable | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.01 | +207% | Mar 2025 | Open |
| Nickel, total recoverable | DMR, Limited - Numeric Violation | 0.17 mg/L | 0.11 | +51% | Mar 2025 | Open |
| Cyanide, total [as CN] | DMR, Limited - Numeric Violation | 0.67 mg/L | 0.04 | +1,526% | Dec 2024 | Open |
| Chromium, total recoverable | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.01 | +303% | Dec 2024 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 2.00 mg/L | 0.22 | +820% | Dec 2024 | Open |
| Nickel, total recoverable | DMR, Limited - Numeric Violation | 0.26 mg/L | 0.11 | +131% | Dec 2024 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.02 kg/d | 0.00 | +1,677% | Nov 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.03 mg/L | 0.02 | +120% | Nov 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 1.43 kg/d | 0.99 | +45% | Nov 2024 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +200% | Nov 2024 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +2,400% | Nov 2024 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.00 kg/d | 0.00 | +58% | Nov 2024 | Open |
| Mercury, total recoverable | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +183% | Sep 2024 | Open |
| Chromium, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +68% | Sep 2024 | Open |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | DMR, Limited - Numeric Violation | 2.00 toxic | 1.60 | +25% | Sep 2024 | Open |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | DMR, Limited - Numeric Violation | 1.50 toxic | 1.00 | +50% | Sep 2024 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.38 mg/L | 0.22 | +75% | Sep 2024 | Open |
| Lead, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +67% | Sep 2024 | Open |
| Lead, total recoverable | DMR, Limited - Numeric Violation | 0.02 mg/L | 0.01 | +67% | Jun 2024 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.34 mg/L | 0.10 | +231% | Jun 2024 | Open |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | DMR, Limited - Numeric Violation | 8.00 toxic | 1.60 | +400% | Jun 2024 | Open |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | DMR, Limited - Numeric Violation | 6.00 toxic | 1.00 | +500% | Jun 2024 | Open |
| Chromium, total recoverable | DMR, Limited - Numeric Violation | 0.08 mg/L | 0.01 | +493% | Jun 2024 | Open |
| Cadmium, total recoverable | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +21% | Jun 2024 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.38 mg/L | 0.22 | +75% | Jun 2024 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 2,400.00 MPN/100mL | 575.00 | +317% | Jun 2024 | Open |
| Cyanide, total [as CN] | DMR, Limited - Numeric Violation | 0.12 mg/L | 0.02 | +650% | May 2024 | Open |
| Cyanide, total [as CN] | DMR, Limited - Numeric Violation | 5.50 kg/d | 1.03 | +434% | May 2024 | 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 Non Penalty AO
Clean Water Act
· Case AZ-N00018341 · Mar 5, 2025
State Administrative Order of Consent
Clean Water Act
· Case AZ-APP-01-23 · Jan 18, 2023
State Administrative Order of Consent
Clean Water Act
· Case AZ-N00017118 · Oct 29, 2022
State Administrative Order of Consent
Clean Water Act
· Case AZ-P-01-22 · Oct 27, 2022
State Administrative Order of Consent
Clean Water Act
· Case AZ-N00000025 · Oct 22, 2010
Administrative - Formal
· Case 09-2006-0158 · Jun 19, 2006
$2,000
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