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Plain City Corporation

Sewage treatment plant, Plain City, Utah. NPDES permit UT0021326, in force until Oct 31, 2030. Last 12 months: over a limit 4 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (31 values), form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 13 reports late

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

Period endingParameterReportedLimitOver by
January 2026BOD, 5-day, percent removal, minimum38 %≥ 65 %77%
January 2026Solids, suspended percent removal, minimum36 %≥ 65 %83%
March 2026BOD, 5-day, percent removal, minimum30 %≥ 65 %100%
April 2026Nitrogen, ammonia total [as N], daily maximum16 mg/L≤ 14 mg/L14%

Limits in force (44)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmaximum monthly average≤ 45 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 65 mg/Lall year
Solids, total suspendedmaximum monthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Oil & Greasedaily maximum≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 6.7 mg/LApr–Jun
Nitrogen, ammonia total [as N]maximum monthly average≤ 3.9 mg/LJul–Sep
Nitrogen, ammonia total [as N]maximum monthly average≤ 6.7 mg/LOct–Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ 8.8 mg/LJan–Mar
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/LApr–Jun
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/LJul–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/LOct–Dec
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/LJan–Mar
Nitrogen, Kjeldahl, total [as N]maximum monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]maximum monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum monthly averagereport only (mg/L)all year
Phosphorus, total [as P]annual maximum≤ 5017 lb/yrall year
Phosphorus, total [as P]maximum monthly averagereport only (mg/L)all year
Phosphate, ortho [as P]maximum monthly averagereport only (mg/L)all year
Chlorine, total residualmaximum monthly average≤ .222 mg/LApr–Jun
Chlorine, total residualmaximum monthly average≤ .129 mg/LJan–Mar
Chlorine, total residualmaximum monthly average≤ .463 mg/LJul–Sep
Chlorine, total residualmaximum monthly average≤ .226 mg/LOct–Dec
Chlorine, total residualdaily maximum≤ .327 mg/LApr–Jun
Chlorine, total residualdaily maximum≤ .19 mg/LJan–Mar
Chlorine, total residualdaily maximum≤ .68 mg/LJul–Sep
Chlorine, total residualdaily maximum≤ .333 mg/LOct–Dec
E. coli30-day geometric mean≤ 126 #/100mLall year
E. coli7-day geometric mean≤ 158 #/100mLall year
Nitrogen, nitrate total [as NO3]maximum monthly averagereport only (mg/L)all year
Nitrogen, nitrite total [as NO2]maximum monthly averagereport only (mg/L)all year
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %all year
Flow, totalmaximum monthly average≤ .6 MGDall year
Flow, totaldaily maximum≤ .9 MGDall year
Flow, totalmaximum monthly averagereport only (MGD)all year
Flow, totaldaily maximumreport only (MGD)all year

How strict are these limits?

Cited limits by parameter: Utah'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/UT0021326 · MCP: https://passage-data.com/mcp