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White Mountain Apache Tribe

Sewage treatment plant, Whiteriver, Arizona. NPDES permit AZ0024058 expired Oct 31, 2026. Last 12 months: over a limit 29 times (last July 2026), 163 required values missing, 20 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 89 days after each period: outfall 001 form A quarterly (33 values), outfall INF form A quarterly (4 values), outfall 001 form T every 54 months, outfall 001 form Y yearly
Last report on file
July 2026
Oct 2024 – Sep 2025
62 values over a limit, 299 required values missing, 15 of 25 reports late

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

All 29 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average49 mg/L≤ 45 mg/L9%
October 2025BOD, 5-day, 20 deg. C, monthly average49 mg/L≤ 45 mg/L9%
October 2025BOD, 5-day, percent removal, monthly average minimum30 %≥ 65 %100%
October 2025BOD, 5-day, percent removal, monthly average minimum30 %≥ 65 %100%
October 2025E. coli, daily maximum2419.6 CFU/100mL≤ 88 CFU/100mL2650%
October 2025E. coli, daily maximum2419.6 CFU/100mL≤ 88 CFU/100mL2650%
October 2025E. coli, geometric mean2419.6 CFU/100mL≤ 47 CFU/100mL5048%
October 2025E. coli, geometric mean2419.6 CFU/100mL≤ 47 CFU/100mL5048%
October 2025Nitrogen, ammonia total [as N], daily maximum1.76 Ratio≤ 1 Ratio76%
October 2025Nitrogen, ammonia total [as N], daily maximum1.76 Ratio≤ 1 Ratio76%
October 2025Nitrogen, ammonia total [as N], monthly average1.76 Ratio≤ 1 Ratio76%
October 2025Nitrogen, ammonia total [as N], monthly average1.76 Ratio≤ 1 Ratio76%
October 2025Solids, suspended percent removal, monthly average minimum29 %≥ 65 %103%
October 2025Solids, suspended percent removal, monthly average minimum29 %≥ 65 %103%
October 2025Solids, total suspended, monthly average49 mg/L≤ 45 mg/L9%
October 2025Solids, total suspended, monthly average49 mg/L≤ 45 mg/L9%
May 2026E. coli, daily maximum2419.6 MPN/100mL≤ 88 CFU/100mL2650%
May 2026E. coli, geometric mean2419.6 MPN/100mL≤ 47 CFU/100mL5048%
May 2026Turbidity, daily maximum34 NTU≤ 25 NTU—
June 2026E. coli, daily maximum290.9 CFU/100mL≤ 88 CFU/100mL231%
June 2026E. coli, geometric mean290.9 CFU/100mL≤ 47 CFU/100mL519%
June 2026Nitrogen, ammonia total [as N], daily maximum2.1 Ratio≤ 1 Ratio110%
June 2026Nitrogen, ammonia total [as N], monthly average2.1 Ratio≤ 1 Ratio110%
June 2026Turbidity, daily maximum38 NTU≤ 25 NTU—
July 2026BOD, 5-day, percent removal, monthly average minimum25 %≥ 65 %114%
July 2026E. coli, daily maximum2419.6 MPN/100mL≤ 88 CFU/100mL2650%
July 2026E. coli, geometric mean2419.6 MPN/100mL≤ 47 CFU/100mL5048%
July 2026Nitrogen, ammonia total [as N], daily maximum2.1 Ratio≤ 1 Ratio110%
July 2026Nitrogen, ammonia total [as N], monthly average2.1 Ratio≤ 1 Ratio110%

Limits in force (52)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximum≤ 32.2 deg Call year001
Turbiditydaily maximum≤ 25 NTUall year001
Oxygen, dissolved [DO]minimum≥ 5 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. Cmonthly average≤ 262.87 lb/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 397.7 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 45 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 65 mg/Lall year001
Solids, total suspendedmonthly average≤ 262.87 kg/dall year001
Solids, total suspendedhighest weekly average≤ 379.7 kg/dall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (lb/d)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]monthly average≤ 1 Ratioall year001
Nitrogen, ammonia total [as N]daily maximum≤ 1 Ratioall year001
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, nitrate total [as N]daily maximum≤ 10 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (ug/L)all year001
Arsenic, total recoverabledaily maximumreport only (ug/L)all year001
Beryllium, total recoverable [as Be]daily maximumreport only (ug/L)all year001
Nickel, total recoverabledaily maximumreport only (ug/L)all year001
Silver total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Cadmium, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Chromium, total recoverabledaily maximumreport only (ug/L)all year001
Copper, total recoverabledaily maximumreport only (ug/L)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 plantweekly averagereport only (MGD)all year001
E. coligeometric mean≤ 47 CFU/100mLall year001
E. colidaily maximum≤ 88 CFU/100mLall year001
Oil & grease, total recoverable [Q/C]monthly average≤ 10 mg/Lall year001
Oil & grease, total recoverable [Q/C]daily maximum≤ 15 mg/Lall year001
Mercury, total recoverabledaily maximumreport only (ug/L)all year001
Cyanide, total recoverabledaily maximumreport only (ug/L)all year001
BOD, 5-day, 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 median≤ 0 pass=0;fail=1all 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
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedweekly averagereport only (mg/L)all yearINF

How strict are these limits?

Cited limits by parameter: Arizona'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/AZ0024058 · MCP: https://passage-data.com/mcp