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Hotchkiss Town of

Sewage treatment plant, Delta County, Colorado. NPDES permit CO0044903 expired Jul 31, 2018; its limits still apply. Last 12 months: over a limit 4 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (4 values), outfall 001 form AQ quarterly (14 values), outfall 001 form B monthly (16 values), outfall 001 form BQ quarterly (14 values), outfall 300 form I quarterly (10 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 21 of 36 reports late

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

Period endingParameterReportedLimitOver by
March 2026BOD, 5-day, 20 deg. C, 30-day average32.85 mg/L≤ 30 mg/L10%
March 2026BOD, 5-day, 20 deg. C, 30-day average49.4 mg/L≤ 30 mg/L65%
March 2026BOD, 5-day, 20 deg. C, maximum 7-day average49.4 mg/L≤ 45 mg/L10%
March 2026BOD, 5-day, 20 deg. C, maximum 7-day average49.4 mg/L≤ 45 mg/L10%

Limits in force (96)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum 7-day average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum 7-day average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. C30-day average≤ 123.5 lb/dall year001
BOD, 5-day, 20 deg. C30-day average≤ 123.5 lb/dall year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 75 mg/Lall year001
Solids, total suspended30-day average≤ 75 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 110 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 110 mg/Lall year001
Solids, total suspended30-day average≤ 309 lb/dall year001
Solids, total suspended30-day average≤ 309 lb/dall year001
Nitrogen, ammonia total [as N]30-day average≤ 23 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 26 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 26 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 26 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 40 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 40 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 35 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 40 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 40 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 40 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 38 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 7 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 7 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 7 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 8 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 11 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 33 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 34 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 32 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 12 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 12 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 12 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 12 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 12 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 33 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 34 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 32 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 15 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 33 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 34 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 32 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 28 mg/LOct001
Nitrogen, nitrite total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, inorganic totaldaily maximumreport only (mg/L)all year001
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .494 MGDall year001
Flow, in conduit or thru treatment plant30-day average≤ .494 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .43 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .5 mg/Lall year001
E. coli30-day geometric mean≤ 2000 #/100mLall year001
E. coli30-day geometric mean≤ 1920 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 4000 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 4000 #/100mLall year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year001
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year001
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (lb/d)all year300
Solids, total suspended30-day averagereport only (mg/L)all year300
Solids, total suspendedmaximum 7-day averagereport only (mg/L)all year300
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year300
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year300

How strict are these limits?

Cited limits by parameter: Colorado'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/CO0044903 · MCP: https://passage-data.com/mcp