Passage Data · Check a report · Use it from your AI
Sewage treatment plant, major discharger, Union, Missouri. NPDES permit MO0025283 expired Jun 30, 2025; its limits still apply. Last 12 months: no values over a limit, 29 of 29 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 15 mg/L | all year | 002 |
| Oil and grease [soxhlet extr.] tot. | monthly average | ≤ 10 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.3 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | Jan, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.3 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.7 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14.8 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 11.5 mg/L | Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.9 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 14.4 mg/L | Jan, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 8.1 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12.3 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.7 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 14.3 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12.5 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10.2 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 7.9 mg/L | Jun | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 19.9 ug/L | all year | 002 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | ≤ 9.2 ug/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| E. coli | 7-day geometric mean | ≤ 630 #/100mL | Apr–Oct | 002 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | Apr–Oct | 002 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (toxic) | all year | 002 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (toxic) | all year | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | INF |
| Solids, total suspended | monthly average | report only (mg/L) | all year | INF |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | INF |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | INF |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | INF |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | INF |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | INF |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | INF |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | INF |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | INF |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | SM2 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | SM2 |
Cited limits by parameter: Missouri's rules and the federal ones.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MO0025283 · MCP: https://passage-data.com/mcp