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Driggs, City of

Sewage treatment plant, Driggs, Idaho. NPDES permit ID0020141 expired Dec 31, 2015; its limits still apply. Last 12 months: over a limit 49 times (last September 2026), 4 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form A monthly (24 values), form B monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
52 values over a limit, 14 required values missing, 4 of 24 reports late

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

All 49 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum100.46 lb/d≤ 8.4 lb/d1096%
October 2025Nitrogen, ammonia total [as N], daily maximum36.5 mg/L≤ 1.68 mg/L2073%
October 2025Nitrogen, ammonia total [as N], monthly average11.78 mg/L≤ .84 mg/L1302%
October 2025Nitrogen, ammonia total [as N], monthly average98.13 lb/d≤ 4.2 lb/d2236%
November 2025Nitrogen, ammonia total [as N], daily maximum35.2 mg/L≤ 1.68 mg/L1995%
November 2025Nitrogen, ammonia total [as N], daily maximum99.52 lb/d≤ 8.4 lb/d1085%
November 2025Nitrogen, ammonia total [as N], monthly average11.03 mg/L≤ .84 mg/L1213%
November 2025Nitrogen, ammonia total [as N], monthly average92.12 lb/d≤ 4.2 lb/d2093%
December 2025Nitrogen, ammonia total [as N], daily maximum33.8 mg/L≤ 1.68 mg/L1912%
December 2025Nitrogen, ammonia total [as N], daily maximum81.75 lb/d≤ 8.4 lb/d873%
December 2025Nitrogen, ammonia total [as N], monthly average78.9 lb/d≤ 4.2 lb/d1779%
December 2025Nitrogen, ammonia total [as N], monthly average9.47 mg/L≤ .84 mg/L1027%
January 2026Nitrogen, ammonia total [as N], daily maximum117.1 lb/d≤ 8.4 lb/d1294%
January 2026Nitrogen, ammonia total [as N], daily maximum38.8 mg/L≤ 1.68 mg/L2210%
January 2026Nitrogen, ammonia total [as N], monthly average108.5 lb/d≤ 4.2 lb/d2483%
January 2026Nitrogen, ammonia total [as N], monthly average13 mg/L≤ .84 mg/L1448%
February 2026Nitrogen, ammonia total [as N], daily maximum106 lb/d≤ 8.4 lb/d1162%
February 2026Nitrogen, ammonia total [as N], daily maximum40.3 mg/L≤ 1.68 mg/L2299%
February 2026Nitrogen, ammonia total [as N], monthly average104.3 lb/d≤ 4.2 lb/d2383%
February 2026Nitrogen, ammonia total [as N], monthly average12.5 mg/L≤ .84 mg/L1388%
March 2026Nitrogen, ammonia total [as N], daily maximum167.21 lb/d≤ 8.4 lb/d1891%
March 2026Nitrogen, ammonia total [as N], daily maximum42.2 mg/L≤ 1.68 mg/L2412%
March 2026Nitrogen, ammonia total [as N], monthly average144.88 lb/d≤ 4.2 lb/d3350%
March 2026Nitrogen, ammonia total [as N], monthly average17.41 mg/L≤ .84 mg/L1973%
April 2026Nitrogen, ammonia total [as N], daily maximum109.73 lb/d≤ 8.4 lb/d1206%
April 2026Nitrogen, ammonia total [as N], daily maximum44.6 mg/L≤ 1.68 mg/L2555%
April 2026Nitrogen, ammonia total [as N], monthly average106.32 lb/d≤ 4.2 lb/d2431%
April 2026Nitrogen, ammonia total [as N], monthly average12.75 mg/L≤ .84 mg/L1418%
May 2026Nitrogen, ammonia total [as N], daily maximum116.69 lb/d≤ 8.4 lb/d1289%
May 2026Nitrogen, ammonia total [as N], daily maximum45.8 mg/L≤ 1.68 mg/L2626%
May 2026Nitrogen, ammonia total [as N], monthly average115.45 lb/d≤ 4.2 lb/d2649%
May 2026Nitrogen, ammonia total [as N], monthly average13.85 mg/L≤ .84 mg/L1549%
June 2026E. coli, instantaneous maximum533.5 #/100mL≤ 406 #/100mL31%
June 2026Nitrogen, ammonia total [as N], daily maximum169.4 lb/d≤ 8.4 lb/d1917%
June 2026Nitrogen, ammonia total [as N], daily maximum41.2 mg/L≤ 1.68 mg/L2352%
June 2026Nitrogen, ammonia total [as N], monthly average157.1 lb/d≤ 4.2 lb/d3640%
June 2026Nitrogen, ammonia total [as N], monthly average18.81 mg/L≤ .84 mg/L2139%
July 2026Nitrogen, ammonia total [as N], daily maximum228.4 lb/d≤ 8.4 lb/d2619%
July 2026Nitrogen, ammonia total [as N], daily maximum48.6 mg/L≤ 1.68 mg/L2793%
July 2026Nitrogen, ammonia total [as N], monthly average201.42 lb/d≤ 4.2 lb/d4696%
July 2026Nitrogen, ammonia total [as N], monthly average24.04 mg/L≤ .84 mg/L2762%
August 2026Nitrogen, ammonia total [as N], daily maximum186.98 lb/d≤ 8.4 lb/d2126%
August 2026Nitrogen, ammonia total [as N], daily maximum47.1 mg/L≤ 1.68 mg/L2704%
August 2026Nitrogen, ammonia total [as N], monthly average182.08 lb/d≤ 4.2 lb/d4235%
August 2026Nitrogen, ammonia total [as N], monthly average21.83 mg/L≤ .84 mg/L2499%
September 2026Nitrogen, ammonia total [as N], daily maximum144.7 lb/d≤ 8.4 lb/d1623%
September 2026Nitrogen, ammonia total [as N], daily maximum40.4 mg/L≤ 1.68 mg/L2305%
September 2026Nitrogen, ammonia total [as N], monthly average140.24 lb/d≤ 4.2 lb/d3239%
September 2026Nitrogen, ammonia total [as N], monthly average16.84 mg/L≤ .84 mg/L1905%

Limits in force (42)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Oxygen, dissolved [DO]monthly averagereport only (mg/L)Jun, Dec
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jun, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 225 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 325 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
Alkalinity, total [as CaCO3]monthly averagereport only (mg/L)Jun, Dec
Alkalinity, total [as CaCO3]daily maximumreport only (mg/L)Jun, Dec
Solids, total suspendedmonthly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 65 mg/Lall year
Solids, total suspendedmonthly average≤ 225 lb/dall year
Solids, total suspendedweekly average≤ 325 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ .84 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 1.68 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 4.2 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 lb/dall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jun, Dec
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Jun, Dec
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jun, Dec
Phosphorus, total [as P]monthly averagereport only (mg/L)Jun, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun, Dec
Oil and greasemonthly averagereport only (mg/L)Jun, Dec
Oil and greasedaily maximumreport only (mg/L)Jun, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ 12.4 ug/Lall year
Chlorine, total residualdaily maximum≤ 17.8 ug/Lall year
Chlorine, total residualmonthly average≤ .062 lb/dall year
Chlorine, total residualdaily maximum≤ .089 lb/dall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. coliinstantaneous maximum≤ 406 #/100mLall year
Solids, total dissolvedmonthly averagereport only (mg/L)Jun, Dec
Solids, total dissolveddaily maximumreport only (mg/L)Jun, Dec
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %all year

How strict are these limits?

Cited limits by parameter: Idaho's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ID0020141 · MCP: https://passage-data.com/mcp