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Sewage treatment plant, major discharger, Tucson, Arizona. NPDES permit AZ0026417 expired Oct 31, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year |
| pH | minimum | report only (SU) | all year |
| pH | maximum | report only (SU) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year |
| Sulfide, total [as S] | daily maximum | report only (ug/L) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | all year |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year |
| Beryllium, total recoverable [as Be] | daily maximum | report only (ug/L) | all year |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year |
| Silver total recoverable | daily maximum | report only (ug/L) | all year |
| Silver total recoverable | daily maximum | report only (ug/L) | all year |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year |
| Antimony, total recoverable | daily maximum | report only (ug/L) | all year |
| Chloroform | daily maximum | report only (ug/L) | all year |
| 1,1-Dichloroethylene | daily maximum | report only (ug/L) | all year |
| Trichloroethylene | daily maximum | ≤ 5 ug/L | all year |
| Trichloroethylene | daily maximum | report only (ug/L) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year |
| PER-AND POLYFLUOROALKYL SUBSTANCES | daily maximum | ≤ 70 ng/L | all year |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year |
| Hydrogen sulfide | daily maximum | report only (ug/L) | all year |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year |
| cis-1,2-Dichloroethylene | daily maximum | report only (ug/L) | all year |
| 1,4-Dioxane | daily maximum | ≤ .35 ug/L | all year |
| 1,4-Dioxane | daily maximum | report only (ug/L) | all year |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | monthly median | report only (tox chronic) | all year |
| TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum) | daily maximum | report only (tox chronic) | all year |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | monthly median | report only (tox chronic) | all year |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | daily maximum | report only (tox chronic) | all year |
| TU Static Renewal 7-Day Chronic Pimphales promelas | monthly median | report only (tox chronic) | all year |
| TU Static Renewal 7-Day Chronic Pimphales promelas | daily maximum | report only (tox chronic) | all year |
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/AZ0026417 · MCP: https://passage-data.com/mcp