Passage Data · Check a report · Use it from your AI
Sewage treatment plant, Lodge Grass, Montana. NPDES permit MT0021890, in force until Dec 31, 2028. Last 12 months: over a limit 23 times (last June 2026), 2 required values missing, 9 of 31 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | BOD, 5-day, 20 deg. C, 30-day average | 69 mg/L | ≤ 30 mg/L | 130% |
| January 2026 | BOD, 5-day, 20 deg. C, 7-day average | 69 mg/L | ≤ 45 mg/L | 53% |
| January 2026 | BOD, 5-day, percent removal, monthly average minimum | 59 % | ≥ 65 % | 17% |
| January 2026 | E. coli, 30-day average | 710000 #/100mL | ≤ 126 #/100mL | — |
| January 2026 | E. coli, daily maximum | 23666.7 #/100mL | ≤ 410 #/100mL | 5672% |
| February 2026 | BOD, 5-day, 20 deg. C, 30-day average | 90 mg/L | ≤ 30 mg/L | 200% |
| February 2026 | BOD, 5-day, 20 deg. C, 7-day average | 90 mg/L | ≤ 45 mg/L | 100% |
| February 2026 | BOD, 5-day, percent removal, monthly average minimum | 40 % | ≥ 65 % | 71% |
| February 2026 | E. coli, 30-day average | 1100000 #/100mL | ≤ 126 #/100mL | — |
| February 2026 | E. coli, daily maximum | 36666.7 #/100mL | ≤ 410 #/100mL | 8843% |
| March 2026 | BOD, 5-day, 20 deg. C, 30-day average | 61 mg/L | ≤ 30 mg/L | 103% |
| March 2026 | BOD, 5-day, 20 deg. C, 7-day average | 61 mg/L | ≤ 45 mg/L | 36% |
| March 2026 | BOD, 5-day, percent removal, monthly average minimum | 64.1 % | ≥ 65 % | 3% |
| March 2026 | E. coli, 30-day average | 140000 #/100mL | ≤ 126 #/100mL | — |
| March 2026 | E. coli, daily maximum | 140000 #/100mL | ≤ 410 #/100mL | 34046% |
| April 2026 | BOD, 5-day, 20 deg. C, 30-day average | 53 mg/L | ≤ 30 mg/L | 77% |
| April 2026 | BOD, 5-day, 20 deg. C, 7-day average | 53 mg/L | ≤ 45 mg/L | 18% |
| April 2026 | BOD, 5-day, percent removal, monthly average minimum | 64.6 % | ≥ 65 % | 1% |
| April 2026 | E. coli, 30-day average | 100000 #/100mL | ≤ 126 #/100mL | 79265% |
| April 2026 | E. coli, daily maximum | 100000 #/100mL | ≤ 410 #/100mL | 24290% |
| May 2026 | BOD, 5-day, 20 deg. C, 30-day average | 35 mg/L | ≤ 30 mg/L | 17% |
| June 2026 | BOD, 5-day, 20 deg. C, 30-day average | 35 mg/L | ≤ 30 mg/L | 17% |
| June 2026 | Solids, total suspended, 30-day average | 130 mg/L | ≤ 100 mg/L | 30% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 65 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 65 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 100 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 100 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 135 mg/L | all year | 001 |
| Solids, total suspended | 7-day average | ≤ 135 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 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, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Nitrite + Nitrate total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Nitrite + Nitrate total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | Jul–Sep | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jul–Sep | 001 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Flow | 30-day average | report only (MGD) | all year | 001 |
| Flow | 30-day average | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| Oil and grease visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Oil and grease visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 100 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 100 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 135 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 135 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Nitrogen, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 002 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Nitrite + Nitrate total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Nitrite + Nitrate total [as N] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Jul–Sep | 002 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | Jul–Sep | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jul–Sep | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jul–Sep | 002 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| Floating solids, waste or visible foam-visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| E. coli | 30-day average | ≤ 126 #/100mL | all year | 002 |
| E. coli | 30-day average | ≤ 126 #/100mL | all year | 002 |
| E. coli | daily maximum | ≤ 410 #/100mL | all year | 002 |
| E. coli | daily maximum | ≤ 410 #/100mL | all year | 002 |
| Flow | 30-day average | report only (MGD) | all year | 002 |
| Flow | 30-day average | report only (MGD) | all year | 002 |
| Flow | daily maximum | report only (MGD) | all year | 002 |
| Flow | daily maximum | report only (MGD) | all year | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 65 % | all year | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 65 % | all year | 002 |
| Oil and grease visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| Oil and grease visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | I001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | I001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | I001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | I001 |
Cited limits by parameter: Montana'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/MT0021890 · MCP: https://passage-data.com/mcp