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Apache Junction Sewer District

Sewage treatment plant, major discharger, Apache Junction, Arizona. NPDES permit AZ0023931, in force until Jul 23, 2029. Last 12 months: no values over a limit, 3 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (26 values), outfall 001 form Q quarterly (34 values), outfall 01B form A monthly (55 values), outfall 01B form Q quarterly (8 values), outfall INF form A monthly (4 values), outfall 001 form S twice a year, and 2 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 3 of 46 reports late

Limits in force (147)

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≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 341 kg/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 511 kg/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 341 kg/dall year001
Solids, total suspendedweekly average≤ 511 kg/dall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasemonthly average≤ 110 kg/dall year001
Oil & Greasedaily maximum≤ 170 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≤ 90 g/dall year001
Cyanide, total [as CN]daily maximum≤ 180 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≤ 600 ug/Lall year001
Iron, total recoverabledaily maximum≤ 2000 ug/Lall year001
Iron, total recoverablemonthly average≤ 7000 g/dall year001
Iron, total recoverabledaily maximum≤ 20000 g/dall year001
Selenium, total recoverablemonthly average≤ 2 ug/Lall year001
Selenium, total recoverabledaily maximum≤ 3 ug/Lall year001
Selenium, total recoverablemonthly average≤ 20 g/dall year001
Selenium, total recoverabledaily maximum≤ 40 g/dall year001
Copper, total recoverablemonthly average≤ 9.6 ug/Lall year001
Copper, total recoverabledaily maximum≤ 27 ug/Lall year001
Copper, total recoverablemonthly average≤ 110 g/dall year001
Copper, total recoverabledaily maximum≤ 310 g/dall year001
Chromium, hexavalent dissolved [as Cr]monthly average≤ 7.7 ug/Lall year001
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 16 ug/Lall year001
Chromium, hexavalent dissolved [as Cr]monthly average≤ 88 g/dall year001
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 180 g/dall year001
Methoxychlormonthly average≤ .02 ug/Lall year001
Methoxychlordaily maximum≤ .05 ug/Lall year001
Methoxychlormonthly average≤ .3 g/dall year001
Methoxychlordaily maximum≤ .6 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≤ 9 ug/Lall year001
Chlorine, total residualdaily maximum≤ 18 ug/Lall year001
Chlorine, total residualmonthly average≤ 100 g/dall year001
Chlorine, total residualdaily maximum≤ 210 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 averagereport only (ug/L)all year001
Hydrogen sulfidedaily maximumreport only (ug/L)all year001
Mercury, total recoverablemonthly average≤ .006 ug/Lall year001
Mercury, total recoverabledaily maximum≤ .02 ug/Lall year001
Mercury, total recoverablemonthly average≤ .06 g/dall year001
Mercury, total recoverabledaily maximum≤ .2 g/dall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Pass/Fail Static 96Hr Acute Ceriodaphnia Dubiamonthly median≤ 0 pass=0;fail=1all year001
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelasmonthly median≤ 0 pass=0;fail=1all year001
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)monthly median≤ 1 tox chronicall year001
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximum≤ 1.6 tox chronicall year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamonthly median≤ 1 tox chronicall year001
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiadaily maximum≤ 1.6 tox chronicall year001
TU Static Renewal 7-Day Chronic Pimphales promelasmonthly median≤ 1 tox chronicall year001
TU Static Renewal 7-Day Chronic Pimphales promelasdaily maximum≤ 1.6 tox chronicall year001
Temperature, water deg. centigrademonthly averagereport only (deg C)all year01B
Temperature, water deg. centigradedaily maximumreport only (deg C)all year01B
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year01B
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year01B
BOD, 5-day, 20 deg. Cmonthly average≤ 740 kg/dall year01B
BOD, 5-day, 20 deg. Cweekly average≤ 1100 kg/dall year01B
pHminimum≥ 6.5 SUall year01B
pHmaximum≤ 9 SUall year01B
Solids, total suspendedmonthly average≤ 30 mg/Lall year01B
Solids, total suspendedweekly average≤ 45 mg/Lall year01B
Solids, total suspendedmonthly average≤ 740 kg/dall year01B
Solids, total suspendedweekly average≤ 1100 kg/dall year01B
Oil & Greasemonthly average≤ 10 mg/Lall year01B
Oil & Greasedaily maximum≤ 15 mg/Lall year01B
Oil & Greasemonthly average≤ 250 kg/dall year01B
Oil & Greasedaily maximum≤ 370 kg/dall year01B
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year01B
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year01B
Nitrogen, ammonia total [as N]monthly average≤ 1 Ratioall year01B
Nitrogen, ammonia total [as N]daily maximum≤ 2 Ratioall year01B
Cyanide, total [as CN]monthly average≤ 7.9 ug/Lall year01B
Cyanide, total [as CN]daily maximum≤ 16 ug/Lall year01B
Cyanide, total [as CN]monthly average≤ 200 g/dall year01B
Cyanide, total [as CN]daily maximum≤ 390 g/dall year01B
Sulfide, total [as S]monthly averagereport only (ug/L)all year01B
Sulfide, total [as S]daily maximumreport only (ug/L)all year01B
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year01B
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year01B
Iron, total recoverablemonthly average≤ 600 ug/Lall year01B
Iron, total recoverabledaily maximum≤ 2000 ug/Lall year01B
Iron, total recoverablemonthly average≤ 20000 g/dall year01B
Iron, total recoverabledaily maximum≤ 40000 g/dall year01B
Selenium, total recoverablemonthly average≤ 2 ug/Lall year01B
Selenium, total recoverabledaily maximum≤ 3 ug/Lall year01B
Selenium, total recoverablemonthly average≤ 40 g/dall year01B
Selenium, total recoverabledaily maximum≤ 80 g/dall year01B
Copper, total recoverablemonthly average≤ 9.6 ug/Lall year01B
Copper, total recoverabledaily maximum≤ 27 ug/Lall year01B
Copper, total recoverablemonthly average≤ 240 g/dall year01B
Copper, total recoverabledaily maximum≤ 670 g/dall year01B
Chromium, hexavalent dissolved [as Cr]monthly average≤ 7.7 ug/Lall year01B
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 16 ug/Lall year01B
Chromium, hexavalent dissolved [as Cr]monthly average≤ 190 g/dall year01B
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 390 g/dall year01B
Methoxychlormonthly average≤ .02 ug/Lall year01B
Methoxychlordaily maximum≤ .05 ug/Lall year01B
Methoxychlormonthly average≤ .6 g/dall year01B
Methoxychlordaily maximum≤ 1 g/dall year01B
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01B
Chlorine, total residualmonthly average≤ 9 ug/Lall year01B
Chlorine, total residualdaily maximum≤ 18 ug/Lall year01B
Chlorine, total residualmonthly average≤ 220 g/dall year01B
Chlorine, total residualdaily maximum≤ 440 g/dall year01B
E. coli, colony forming units [CFU]monthly average≤ 126 CFU/100mLall year01B
E. coli, colony forming units [CFU]daily maximum≤ 575 CFU/100mLall year01B
Hydrogen sulfidemonthly averagereport only (ug/L)all year01B
Hydrogen sulfidedaily maximumreport only (ug/L)all year01B
Mercury, total recoverablemonthly average≤ .006 ug/Lall year01B
Mercury, total recoverabledaily maximum≤ .02 ug/Lall year01B
Mercury, total recoverablemonthly average≤ .1 g/dall year01B
Mercury, total recoverabledaily maximum≤ .4 g/dall year01B
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year01B
Solids, suspended percent removalmonthly average minimum≥ 85 %all year01B
Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiamonthly median≤ 0 pass=0;fail=1all year01B
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelasmonthly median≤ 0 pass=0;fail=1all year01B
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)monthly median≤ 1 tox chronicall year01B
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximum≤ 1.6 tox chronicall year01B
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamonthly median≤ 1 tox chronicall year01B
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiadaily maximum≤ 1.6 tox chronicall year01B
TU Static Renewal 7-Day Chronic Pimphales promelasmonthly median≤ 1 tox chronicall year01B
TU Static Renewal 7-Day Chronic Pimphales promelasdaily maximum≤ 1.6 tox chronicall year01B
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/AZ0023931 · MCP: https://passage-data.com/mcp