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Beet Sugar, major discharger, Billings, Montana. NPDES permit MT0000281 expired Nov 30, 2014; its limits still apply. Last 12 months: over a limit 32 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 001 | Chlorine, total residual, 30-day average | < .098 mg/L | ≤ .011 mg/L | 791% |
| October 2025 | 001 | Chlorine, total residual, daily maximum | .901 mg/L | ≤ .019 mg/L | 4642% |
| October 2025 | 001 | Nitrogen, ammonia total [as N], 30-day average | 7.9 mg/L | ≤ 2.8 mg/L | 182% |
| October 2025 | 001 | Nitrogen, ammonia total [as N], daily maximum | 8.6 mg/L | ≤ 7.08 mg/L | 21% |
| October 2025 | 004 | Nitrogen, ammonia total [as N], daily maximum | 41 mg/L | ≤ 35 mg/L | 17% |
| October 2025 | 004 | Specific conductance, daily maximum | 2908 umho/cm | ≤ 2500 umho/cm | 16% |
| November 2025 | 001 | Chlorine, total residual, 30-day average | .065 mg/L | ≤ .011 mg/L | 491% |
| November 2025 | 001 | Chlorine, total residual, daily maximum | .217 mg/L | ≤ .019 mg/L | 1042% |
| November 2025 | 001 | Nitrogen, ammonia total [as N], 30-day average | 8.1 mg/L | ≤ 2.8 mg/L | 189% |
| November 2025 | 001 | Nitrogen, ammonia total [as N], daily maximum | 8.6 mg/L | ≤ 7.08 mg/L | 21% |
| November 2025 | 004 | Nitrogen, ammonia total [as N], daily maximum | 41 mg/L | ≤ 35 mg/L | 17% |
| December 2025 | 001 | Chlorine, total residual, daily maximum | .162 mg/L | ≤ .019 mg/L | 753% |
| December 2025 | 001 | Coliform, fecal general, daily maximum | > 2419 MPN/100mL | ≤ 400 MPN/100mL | — |
| December 2025 | 001 | Nitrogen, ammonia total [as N], 30-day average | 8.9 mg/L | ≤ 2.8 mg/L | 218% |
| December 2025 | 001 | Nitrogen, ammonia total [as N], daily maximum | 9.9 mg/L | ≤ 7.08 mg/L | 40% |
| December 2025 | 004 | Nitrogen, ammonia total [as N], daily maximum | 40 mg/L | ≤ 35 mg/L | 14% |
| December 2025 | 004 | Specific conductance, daily maximum | 3003 umho/cm | ≤ 2500 umho/cm | 20% |
| January 2026 | 001 | Chlorine, total residual, 30-day average | .019 mg/L | ≤ .011 mg/L | 73% |
| January 2026 | 001 | Chlorine, total residual, daily maximum | .298 mg/L | ≤ .019 mg/L | 1468% |
| January 2026 | 001 | Nitrogen, ammonia total [as N], 30-day average | 8.1 mg/L | ≤ 2.8 mg/L | 189% |
| January 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 9.2 mg/L | ≤ 7.08 mg/L | 30% |
| January 2026 | 004 | Nitrogen, ammonia total [as N], daily maximum | 43 mg/L | ≤ 35 mg/L | 23% |
| January 2026 | 004 | Specific conductance, daily maximum | 3357 umho/cm | ≤ 2500 umho/cm | 34% |
| February 2026 | 001 | Chlorine, total residual, daily maximum | .021 mg/L | ≤ .019 mg/L | 11% |
| February 2026 | 001 | Nitrogen, ammonia total [as N], 30-day average | 9.4 mg/L | ≤ 2.8 mg/L | 236% |
| February 2026 | 001 | Nitrogen, ammonia total [as N], daily maximum | 9.9 mg/L | ≤ 7.08 mg/L | 40% |
| February 2026 | 004 | Nitrogen, ammonia total [as N], daily maximum | 41 mg/L | ≤ 35 mg/L | 17% |
| February 2026 | 004 | Specific conductance, daily maximum | 2986 umho/cm | ≤ 2500 umho/cm | 19% |
| March 2026 | 004 | Nitrogen, ammonia total [as N], daily maximum | 38 mg/L | ≤ 35 mg/L | 9% |
| March 2026 | 004 | Specific conductance, daily maximum | 3105 umho/cm | ≤ 2500 umho/cm | 24% |
| April 2026 | 004 | Nitrogen, ammonia total [as N], daily maximum | 37 mg/L | ≤ 35 mg/L | 6% |
| April 2026 | 004 | Specific conductance, daily maximum | 3196 umho/cm | ≤ 2500 umho/cm | 28% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily minimum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | 30-day average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 77 deg F | all year | 001 |
| Flow rate | 30-day average | report only (gal/d) | all year | 001 |
| Flow rate | daily maximum | report only (gal/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 2640 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 3960 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 2640 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 3960 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.08 mg/L | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 10 mg/L | all year | 001 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | single sample | report only (ug/L) | all year | 001 |
| Iron, total recoverable | single sample | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | single sample | report only (ug/L) | all year | 001 |
| Lead, total recoverable | single sample | report only (ug/L) | all year | 001 |
| E. coli, MTEC-MF | 30-day average | ≤ 126 CFU/100mL | Apr–Oct | 001 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 001 |
| Solids, total dissolved [TDS] | 30-day average | report only (mg/L) | all year | 001 |
| Mercury, total recoverable | single sample | report only (ug/L) | all year | 001 |
| Coliform, fecal general | daily maximum | ≤ 400 MPN/100mL | all year | 001 |
| Oil and grease visual | value | report only (N=0;Y=1) | all year | 001 |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | value | ≤ 0 pass=0;fail=1 | all year | 001 |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | value | ≤ 0 pass=0;fail=1 | all year | 001 |
| Temperature, water deg. fahrenheit | 30-day average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 77 deg F | all year | 002 |
| Flow rate | 30-day average | report only (gal/d) | all year | 002 |
| Flow rate | daily maximum | report only (gal/d) | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 2640 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 3960 mg/L | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 2640 lb/d | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 3960 lb/d | all year | 002 |
| Oil and grease, hexane extr method | instantaneous maximum | ≤ 10 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.8 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.08 mg/L | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 10 mg/L | all year | 002 |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | 002 |
| Arsenic, total recoverable | single sample | report only (ug/L) | all year | 002 |
| Iron, total recoverable | single sample | report only (ug/L) | all year | 002 |
| Selenium, total recoverable | single sample | report only (ug/L) | all year | 002 |
| Lead, total recoverable | single sample | report only (ug/L) | all year | 002 |
| E. coli, MTEC-MF | 30-day average | ≤ 126 CFU/100mL | Apr–Oct | 002 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 002 |
| Solids, total dissolved [TDS] | 30-day average | report only (mg/L) | all year | 002 |
| Mercury, total recoverable | single sample | report only (ug/L) | all year | 002 |
| Coliform, fecal general | daily maximum | ≤ 400 MPN/100mL | all year | 002 |
| Oil and grease visual | value | report only (N=0;Y=1) | all year | 002 |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | value | ≤ 0 pass=0;fail=1 | all year | 002 |
| Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | value | ≤ 0 pass=0;fail=1 | all year | 002 |
| Specific conductance | daily maximum | ≤ 2500 umho/cm | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 35 mg/L | all year | 004 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | OBS |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | OBS |
| Specific conductance | single sample | report only (umho/cm) | all year | OBS |
| pH | single sample | report only (SU) | all year | OBS |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | OBS |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | OBS |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | OBS |
| Water level at sample collection time | single reading | report only (ft) | all year | OBS |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | W02 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | W02 |
| Specific conductance | single sample | report only (umho/cm) | all year | W02 |
| pH | single sample | report only (SU) | all year | W02 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | W02 |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | W02 |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | W02 |
| Water level at sample collection time | single sample | report only (ft) | all year | W02 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | W03 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | W03 |
| Specific conductance | single sample | report only (umho/cm) | all year | W03 |
| pH | single sample | report only (SU) | all year | W03 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | W03 |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | W03 |
| Arsenic, dissolved [as As] | single sample | report only (ug/L) | all year | W03 |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | W03 |
| Lead, dissolved [as Pb] | single sample | report only (ug/L) | all year | W03 |
| Selenium, dissolved [as Se] | single sample | report only (ug/L) | all year | W03 |
| Mercury, dissolved [as Hg] | single sample | report only (ug/L) | all year | W03 |
| Water level at sample collection time | single sample | report only (ft) | all year | W03 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | W04 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | W04 |
| Specific conductance | single sample | report only (umho/cm) | all year | W04 |
| pH | single sample | report only (SU) | all year | W04 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | W04 |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | W04 |
| Arsenic, dissolved [as As] | single sample | report only (ug/L) | all year | W04 |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | W04 |
| Lead, dissolved [as Pb] | single sample | report only (ug/L) | all year | W04 |
| Selenium, dissolved [as Se] | single sample | report only (ug/L) | all year | W04 |
| Mercury, dissolved [as Hg] | single sample | report only (ug/L) | all year | W04 |
| Water level at sample collection time | single sample | report only (ft) | all year | W04 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | W05 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | W05 |
| Specific conductance | single sample | report only (umho/cm) | all year | W05 |
| pH | single sample | report only (SU) | all year | W05 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | W05 |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | W05 |
| Arsenic, dissolved [as As] | single sample | report only (ug/L) | all year | W05 |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | W05 |
| Lead, dissolved [as Pb] | single sample | report only (ug/L) | all year | W05 |
| Selenium, dissolved [as Se] | single sample | report only (ug/L) | all year | W05 |
| Mercury, dissolved [as Hg] | single sample | report only (ug/L) | all year | W05 |
| Water level at sample collection time | single sample | report only (ft) | all year | W05 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | W06 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | W06 |
| Specific conductance | single sample | report only (umho/cm) | all year | W06 |
| pH | single sample | report only (SU) | all year | W06 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | W06 |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | W06 |
| Arsenic, dissolved [as As] | single sample | report only (ug/L) | all year | W06 |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | W06 |
| Lead, dissolved [as Pb] | single sample | report only (ug/L) | all year | W06 |
| Selenium, dissolved [as Se] | single sample | report only (ug/L) | all year | W06 |
| Mercury, dissolved [as Hg] | single sample | report only (ug/L) | all year | W06 |
| Water level at sample collection time | single reading | report only (ft) | all year | W06 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | W08 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | W08 |
| Specific conductance | single sample | report only (umho/cm) | all year | W08 |
| pH | single sample | report only (SU) | all year | W08 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | W08 |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | W08 |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | W08 |
| Water level at sample collection time | single sample | report only (ft) | all year | W08 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | Apr–Sep | W09 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | Jan, Feb, Mar, Oct, Nov, Dec | W09 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | Apr–Sep | W09 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | Jan, Feb, Mar, Oct, Nov, Dec | W09 |
| Specific conductance | single sample | report only (umho/cm) | Apr–Sep | W09 |
| Specific conductance | single sample | report only (umho/cm) | Jan, Feb, Mar, Oct, Nov, Dec | W09 |
| pH | single sample | report only (SU) | Apr–Sep | W09 |
| pH | single sample | report only (SU) | Jan, Feb, Mar, Oct, Nov, Dec | W09 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | Apr–Sep | W09 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | Jan, Feb, Mar, Oct, Nov, Dec | W09 |
| Nitrogen, Kjeldahl, total [as N] | quarterly maximum | report only (mg/L) | all year | W09 |
| Iron, dissolved [as Fe] | quarterly maximum | report only (ug/L) | all year | W09 |
| Water level at sample collection time | single sample | report only (ft) | Apr–Sep | W09 |
| Water level at sample collection time | single sample | report only (ft) | Jan, Feb, Mar, Oct, Nov, Dec | W09 |
| Temperature, water deg. centigrade | single sample | report only (deg C) | all year | W12 |
| Redox [oxidation reduction potential] | single sample | report only (mv) | all year | W12 |
| Specific conductance | single sample | report only (umho/cm) | all year | W12 |
| pH | single sample | report only (SU) | all year | W12 |
| Nitrogen, ammonia total [as N] | single sample | report only (mg/L) | all year | W12 |
| Nitrogen, Kjeldahl, total [as N] | single sample | report only (mg/L) | all year | W12 |
| Iron, dissolved [as Fe] | single sample | report only (mg/L) | all year | W12 |
| Water level at sample collection time | single sample | report only (ft) | all year | W12 |
Cited limits by parameter: Montana's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/MT0000281 · MCP: https://passage-data.com/mcp