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Ta Operating LLC

Miscellaneous Food Stores, Laurel, Montana. NPDES permit MT0031879 expired Jun 30, 2021; its limits still apply. Last 12 months: over a limit 6 times (last May 2026), 2 of 23 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (26 values), form UP monthly (9 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 13 required values missing, 6 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025E. coli, MTEC-MF, monthly geometric mean272 CFU/100mL≤ 126 CFU/100mL116%
October 2025E. coli, MTEC-MF, weekly geometric mean272 CFU/100mL≤ 252 CFU/100mL8%
April 2026Nitrite + Nitrate total [as N], daily maximum18.9 mg/L≤ 10 mg/L89%
April 2026Nitrite + Nitrate total [as N], monthly average18.9 mg/L≤ 10 mg/L89%
May 2026Nitrite + Nitrate total [as N], daily maximum16.1 mg/L≤ 10 mg/L61%
May 2026Nitrite + Nitrate total [as N], monthly average16.1 mg/L≤ 10 mg/L61%

Limits in force (37)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigrademonthly maximumreport only (deg C)all year
Flow ratemonthly averagereport only (MGD)all year
Flow ratedaily maximumreport only (MGD)all year
Flow ratemonthly averagereport only (MGD)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 4.5 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHvaluereport only (SU)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 4.5 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year
Nitrogen, total [as N]monthly averagereport only (mg/L)Jul–Sep
Nitrogen, total [as N]monthly average≤ 2.25 lb/dJul–Sep
Nitrogen, total [as N]valuereport only (mg/L)Jul–Sep
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]valuereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jul–Sep
Nitrogen, Kjeldahl, total [as N]valuereport only (mg/L)Jul–Sep
Nitrite + Nitrate total [as N]monthly average≤ 10 mg/Lall year
Nitrite + Nitrate total [as N]daily maximum≤ 10 mg/Lall year
Nitrite + Nitrate total [as N]valuereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)Jul–Sep
Phosphorus, total [as P]monthly average≤ .3 lb/dJul–Sep
Phosphorus, total [as P]valuereport only (mg/L)Jul–Sep
E. coli, MTEC-MFmonthly geometric mean≤ 630 CFU/100mLJan, Feb, Mar, Nov, Dec
E. coli, MTEC-MFmonthly geometric mean≤ 126 CFU/100mLApr–Oct
E. coli, MTEC-MFweekly geometric mean≤ 1260 CFU/100mLJan, Feb, Mar, Nov, Dec
E. coli, MTEC-MFweekly geometric mean≤ 252 CFU/100mLApr–Oct
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Montana'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/MT0031879 · MCP: https://passage-data.com/mcp