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Nitrogenous Fertilizers, major discharger, St Helens, Oregon. NPDES permit OR0001635, in force until Sep 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| 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 | daily maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | maximum 7-day average | report only (deg C) | all year | 001 |
| Thermal Discharge | monthly average | ≤ 3160 mkcal/day | Jun–Sep | 001 |
| pH | daily minimum | ≥ 6 SU (alert, not enforceable) | all year | 001 |
| pH | daily maximum | ≤ 9 SU (alert, not enforceable) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 3 mg/L | all year | 001 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, organic total [as N] | monthly average | ≤ 1 mg/L | all year | 001 |
| Nitrogen, organic total [as N] | daily maximum | ≤ 4 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .4 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 4 mg/L | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly average | ≤ 1 mg/L | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | ≤ 4 mg/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 | ≤ .14 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .36 mg/L | all year | 001 |
| pH range excursions, > 60 minutes | total | ≤ 0 occur/mo | all year | 001 |
| pH range excursions, monthly total accum | total | ≤ 446 min | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 002 |
| pH | daily minimum | ≥ 6 SU (alert, not enforceable) | all year | 002 |
| pH | daily maximum | ≤ 9 SU (alert, not enforceable) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 3 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | monthly average | ≤ .05 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .05 mg/L | all year | 002 |
| pH range excursions, > 60 minutes | total | ≤ 0 occur/mo | all year | 002 |
| pH range excursions, monthly total accum | total | ≤ 446 min | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Solids, settleable | daily maximum | ≤ .1 mL/L | all year | 004 |
Cited limits by parameter: Oregon's rules and the federal ones.
Same industry: the 8 Chemicals and Allied Products permits in Oregon.
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Your permit document is the final word. As JSON: /api/v1/permits/OR0001635 · MCP: https://passage-data.com/mcp