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Town Of Gila Bend

Sewage treatment plant, Gila Bend, Arizona. NPDES permit AZ0020231, in force until Jun 9, 2030. Last 12 months: over a limit 23 times (last August 2026), 7 required values missing, 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (26 values), outfall INF form A monthly (4 values), outfall 001 form S twice a year, outfall 001 form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
9 values over a limit, 40 required values missing, 0 of 38 reports late

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

All 23 values over a limit
Period endingParameterReportedLimitOver by
December 2025Cyanide, total [as CN], monthly average12 ug/L≤ 7.9 ug/L52%
March 2026BOD, 5-day, 20 deg. C, monthly average58 mg/L≤ 45 mg/L29%
April 2026Solids, total suspended, monthly average55 mg/L≤ 45 mg/L22%
May 2026BOD, 5-day, 20 deg. C, monthly average78 mg/L≤ 45 mg/L73%
May 2026BOD, 5-day, 20 deg. C, weekly average78 mg/L≤ 65 mg/L20%
June 2026BOD, 5-day, 20 deg. C, monthly average149.92 kg/d≤ 120 kg/d25%
June 2026BOD, 5-day, 20 deg. C, monthly average176 mg/L≤ 45 mg/L291%
June 2026BOD, 5-day, 20 deg. C, weekly average245 mg/L≤ 65 mg/L277%
June 2026BOD, 5-day, 20 deg. C, weekly average271.77 kg/d≤ 170 kg/d60%
June 2026Copper, total recoverable, monthly average16 ug/L≤ 14 ug/L14%
June 2026Cyanide, total [as CN], daily maximum77 ug/L≤ 16 ug/L381%
June 2026Cyanide, total [as CN], daily maximum95.6 g/d≤ 42 g/d128%
June 2026Cyanide, total [as CN], monthly average21.17 g/d≤ 21 g/d1%
June 2026Cyanide, total [as CN], monthly average23.71 ug/L≤ 7.9 ug/L200%
June 2026Solids, total suspended, monthly average78 mg/L≤ 45 mg/L73%
June 2026Solids, total suspended, weekly average78 mg/L≤ 65 mg/L20%
July 2026Solids, total suspended, monthly average58 mg/L≤ 45 mg/L29%
August 2026BOD, 5-day, 20 deg. C, monthly average61 mg/L≤ 45 mg/L36%
August 2026BOD, 5-day, 20 deg. C, weekly average120 mg/L≤ 65 mg/L85%
August 2026BOD, 5-day, percent removal, monthly average minimum63 %≥ 65 %6%
August 2026Solids, total suspended, monthly average71 mg/L≤ 45 mg/L58%
August 2026Solids, total suspended, weekly average151 mg/L≤ 65 mg/L132%
August 2026Solids, total suspended, weekly average214 kg/d≤ 170 kg/d26%

Limits in force (81)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport 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. Cweekly average≤ 65 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 120 kg/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 170 kg/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 65 mg/Lall year001
Solids, total suspendedmonthly average≤ 120 kg/dall year001
Solids, total suspendedweekly average≤ 170 kg/dall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasemonthly average≤ 26 kg/dall year001
Oil & Greasedaily maximum≤ 40 kg/dall 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≤ 2 Ratioall year001
Cyanide, total [as CN]monthly average≤ 7.9 ug/Lall year001
Cyanide, total [as CN]daily maximum≤ 16 ug/Lall year001
Cyanide, total [as CN]monthly average≤ 21 g/dall year001
Cyanide, total [as CN]daily maximum≤ 42 g/dall year001
Sulfide, total [as S]monthly averagereport only (ug/L)all year001
Sulfide, total [as S]daily maximumreport only (ug/L)all year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Iron, total recoverablemonthly average≤ 800 ug/Lall year001
Iron, total recoverabledaily maximum≤ 2000 ug/Lall year001
Iron, total recoverablemonthly average≤ 2000 g/dall year001
Iron, total recoverabledaily maximum≤ 4000 g/dall year001
Selenium, total recoverablemonthly average≤ 2 ug/Lall year001
Selenium, total recoverabledaily maximum≤ 3 ug/Lall year001
Selenium, total recoverablemonthly average≤ 4 g/dall year001
Selenium, total recoverabledaily maximum≤ 9 g/dall year001
Chromium, total [as Cr]monthly averagereport only (ug/L)all year001
Chromium, total [as Cr]daily maximumreport only (ug/L)all year001
Zinc, total recoverablemonthly average≤ 110 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 230 ug/Lall year001
Zinc, total recoverablemonthly average≤ 300 g/dall year001
Zinc, total recoverabledaily maximum≤ 600 g/dall year001
Copper, total recoverablemonthly average≤ 14 ug/Lall year001
Copper, total recoverabledaily maximum≤ 29 ug/Lall year001
Copper, total recoverablemonthly average≤ 38 g/dall year001
Copper, total recoverabledaily maximum≤ 76 g/dall year001
Chromium, hexavalent dissolved [as Cr]monthly average≤ 8 ug/Lall year001
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 16 ug/Lall year001
Chromium, hexavalent dissolved [as Cr]monthly average≤ 21 g/dall year001
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 42 g/dall 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
Chlorine, total residualmonthly average≤ 7.4 ug/Lall year001
Chlorine, total residualdaily maximum≤ 19 ug/Lall year001
Chlorine, total residualmonthly average≤ 19 g/dall year001
Chlorine, total residualdaily maximum≤ 50 g/dall year001
E. coli, colony forming units [CFU]monthly average≤ 126 CFU/100mLall year001
E. coli, colony forming units [CFU]daily maximum≤ 575 CFU/100mLall year001
Hydrogen sulfidemonthly average≤ 2 ug/Lall year001
Hydrogen sulfidedaily maximum≤ 3 ug/Lall year001
Hydrogen sulfidemonthly average≤ 4 g/dall year001
Hydrogen sulfidedaily maximum≤ 9 g/dall year001
Mercury, total recoverablemonthly average≤ .008 ug/Lall year001
Mercury, total recoverabledaily maximum≤ .02 ug/Lall year001
Mercury, total recoverablemonthly average≤ .02 g/dall year001
Mercury, total recoverabledaily maximum≤ .04 g/dall 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, StatR8dmax C dubiamonthly median≤ 0 pass=0;fail=1all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiadaily maximum≤ 0 pass=0;fail=1all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiadaily maximum≤ 50 % effectall 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 maximum≤ 0 pass=0;fail=1all year001
Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasdaily maximum≤ 50 % effectall year001
Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitatamonthly medianreport only (pass=0;fail=1)all year001
Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitatadaily maximumreport only (pass=0;fail=1)all year001
Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitatadaily maximumreport only (% effect)all 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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Your permit document is the final word. As JSON: /api/v1/permits/AZ0020231 · MCP: https://passage-data.com/mcp