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Steam And Air-Conditioning Supply, Seattle, Washington. NPDES permit WA0001503 expired Jan 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | May–Oct | MP1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | May–Oct | MP1 |
| pH | daily minimum | ≥ 6 SU | all year | MP1 |
| pH | daily minimum | ≥ 6 SU | all year | MP1 |
| pH | daily maximum | ≤ 9 SU | all year | MP1 |
| pH | daily maximum | ≤ 9 SU | all year | MP1 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | MP1 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | MP1 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) (alert, not enforceable) | all year | MP1 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) (alert, not enforceable) | all year | MP1 |
| Flow | daily maximum | ≤ 175000 gal/d | all year | MP1 |
| Flow | daily maximum | ≤ 175000 gal/d | all year | MP1 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | MP1 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | MP1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | May–Oct | MP3 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) (alert, not enforceable) | May–Oct | MP3 |
Cited limits by parameter: Washington'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/WA0001503 · MCP: https://passage-data.com/mcp