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Sewerage Systems, Black Canyon City, Arizona. NPDES permit AZ0023060, in force until Feb 22, 2027. Last 12 months: over a limit 6 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Copper, total recoverable, daily maximum | 40 ug/L | ≤ 30.5 ug/L | 31% |
| December 2025 | Copper, total recoverable, monthly average | .75 g/d | ≤ .689 g/d | 9% |
| December 2025 | Copper, total recoverable, monthly average | 40 ug/L | ≤ 18.2 ug/L | 120% |
| December 2025 | E. coli, colony forming units [CFU], daily maximum | 2419.6 CFU/100mL | ≤ 235 CFU/100mL | 930% |
| March 2026 | E. coli, colony forming units [CFU], daily maximum | 2419 CFU/100mL | ≤ 235 CFU/100mL | 929% |
| May 2026 | E. coli, colony forming units [CFU], daily maximum | 2419.6 CFU/100mL | ≤ 235 CFU/100mL | 930% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1.1 kg/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 1.7 kg/d | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | minimum | report only (SU) | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | report only (SU) | all year | 001 |
| pH | minimum | report only (SU) | all year | 001 |
| pH | maximum | report only (SU) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1.1 kg/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1.7 kg/d | all year | 001 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 Ratio | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2 Ratio | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly average | ≤ 10 mg/L | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 13 mg/L | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly average | ≤ .38 kg/d | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ .49 kg/d | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | monthly average | report only (ug/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Sulfide, total [as S] | monthly average | report only (ug/L) | all year | 001 |
| Sulfide, total [as S] | daily maximum | report only (ug/L) | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | monthly average | ≤ 10 ug/L | all year | 001 |
| Arsenic, total recoverable | daily maximum | ≤ 14 ug/L | all year | 001 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Arsenic, total recoverable | monthly average | ≤ .38 g/d | all year | 001 |
| Arsenic, total recoverable | daily maximum | ≤ .53 g/d | all year | 001 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | monthly average | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 18.2 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 30.5 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | monthly average | ≤ .689 g/d | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 1.15 g/d | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 9.3 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 17 ug/L | all year | 001 |
| Chlorine, total residual | monthly average | ≤ .35 g/d | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .64 g/d | all year | 001 |
| E. coli, colony forming units [CFU] | monthly average | ≤ 126 CFU/100mL | all year | 001 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 CFU/100mL | all year | 001 |
| E. coli, colony forming units [CFU] | daily maximum | report only (CFU/100mL) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Hydrogen sulfide | monthly average | report only (ug/L) | all year | 001 |
| Hydrogen sulfide | daily maximum | report only (ug/L) | all year | 001 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | monthly median | report only (tox chronic) | all year | 001 |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | daily maximum | report only (tox chronic) | all year | 001 |
| Static 7Day Chronic Pimephales Promelas | monthly median | report only (tox chronic) | all year | 001 |
| Static 7Day Chronic Pimephales Promelas | daily maximum | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | monthly median | report only (tox chronic) | all year | 001 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | daily maximum | report only (tox chronic) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | INF |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year | INF |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INF |
| Solids, total suspended | weekly average | report only (mg/L) | all year | INF |
Cited limits by parameter: Arizona's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/AZ0023060 · MCP: https://passage-data.com/mcp