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Navajo Tribal Utility Authority

Sewage treatment plant, Farmington, NN. NPDES permit NN0030343, in force until Nov 30, 2027. Last 12 months: over a limit once (last May 2026), 6 required values missing, 2 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (40 values), outfall 001 form Q quarterly (12 values), outfall INF form A quarterly (6 values), outfall 001 form S twice a year, outfall 001 form Y yearly
Renewal application due
Jun 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 2 required values missing, 2 of 32 reports late

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

Period endingParameterReportedLimitOver by
May 2026Nitrogen, ammonia total [as N], monthly average38.46 Ratio≤ 1 Ratio3746%

Limits in force (70)

ParameterStatisticLimitMonthsOutfall
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≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 7.5 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 7.5 lb/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 11.3 lb/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 11.3 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 45 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 7.5 lb/dall year001
Solids, total suspendedmonthly average≤ 7.5 lb/dall year001
Solids, total suspendedhighest weekly average≤ 11.3 lb/dall year001
Solids, total suspendedhighest weekly average≤ 11.3 lb/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
Hardness, total [as CaCO3]monthly averagereport only (ug/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (ug/L)all year001
Selenium, total recoverabledaily maximum≤ 2 ug/Lall year001
Nickel, total recoverabledaily maximum≤ 101 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 229 ug/Lall year001
Copper, total recoverabledaily maximum≤ 17.6 ug/Lall 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
E. coli, colony forming units [CFU]geometric mean≤ 126 CFU/100mLall year001
E. coli, colony forming units [CFU]geometric mean≤ 126 CFU/100mLall year001
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLall year001
E. coli, colony forming units [CFU]daily 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≥ 85 %all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %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 maximum≤ 50 % effectall year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasdaily maximum≤ 50 % effectall year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Chighest weekly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedhighest weekly averagereport only (mg/L)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

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/NN0030343 · MCP: https://passage-data.com/mcp