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Navajo Tribal Utility Authority

Sewage treatment plant, Ganado, NN. NPDES permit NN0022195 expired Jul 31, 2026; its limits still apply. Last 12 months: no values over a limit, 6 required values missing, 3 of 27 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (44 values), outfall 001 form Q quarterly (12 values), outfall INF form A quarterly (12 values), outfall 001 form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 31 reports late

Limits in force (74)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 65 mg/Lall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 65 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 68 kg/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 68 kg/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 98 kg/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 98 kg/dall year001
pHminimum≥ 6.5 SUall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 90 mg/Lall year001
Solids, total suspendedmonthly average≤ 90 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 135 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 135 mg/Lall year001
Solids, total suspendedmonthly average≤ 136 kg/dall year001
Solids, total suspendedmonthly average≤ 136 kg/dall year001
Solids, total suspendedhighest weekly average≤ 203 kg/dall year001
Solids, total suspendedhighest weekly average≤ 203 kg/dall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1 Ratioall year001
Nitrogen, ammonia total [as N]monthly average≤ 1 Ratioall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all 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 residualdaily maximum≤ 11 ug/Lall year001
Chlorine, total residualdaily maximum≤ 11 ug/Lall year001
E. coligeometric mean≤ 126 CFU/100mLall year001
E. coligeometric mean≤ 126 CFU/100mLall year001
E. colidaily maximum≤ 235 CFU/100mLall year001
E. colidaily maximum≤ 235 CFU/100mLall year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolvedmonthly 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 dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolvedmonthly 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 dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
Solids, suspended percent removalmonthly average minimum≥ 65 %all year001
Solids, suspended percent removalmonthly average minimum≥ 65 %all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasmonthly medianreport only (pass=0;fail=1)all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasmonthly medianreport only (pass=0;fail=1)all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasdaily maximumreport only (pass=0;fail=1)all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasdaily maximumreport only (pass=0;fail=1)all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasdaily maximumreport only (% effect)all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasdaily maximumreport only (% effect)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Cmonthly averagereport only (kg/d)all yearINF
BOD, 5-day, 20 deg. Cmonthly averagereport only (kg/d)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (kg/d)all yearINF
Solids, total suspendedmonthly averagereport only (kg/d)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF

How strict are these limits?

Cited limits by parameter: 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/NN0022195 · MCP: https://passage-data.com/mcp