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City Of Tolleson

Sewage treatment plant, major discharger, Tolleson, Arizona. NPDES permit AZ0020338, in force until Feb 3, 2031. Last 12 months: over a limit 4 times (last April 2026), 1 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: outfall 001 form A monthly (54 values), outfall INF form A monthly (4 values), outfall 001 form Q quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
8 values over a limit, 8 required values missing, 0 of 31 reports late

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

Period endingParameterReportedLimitOver by
December 2025TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum), daily maximum2.6 tox chronic≤ 1.6 tox chronic63%
December 2025TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum), monthly median4 tox chronic≤ 1 tox chronic300%
January 2026Nitrogen, ammonia total [as N], monthly average2 Ratio≤ 1 Ratio100%
April 2026E. coli, colony forming units [CFU], daily maximum596≤ 575 CFU/100mL4%

Limits in force (82)

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≤ 2000 kg/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 3000 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≤ 2000 kg/dall year001
Solids, total suspendedweekly average≤ 3000 kg/dall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasemonthly average≤ 660 kg/dall year001
Oil & Greasedaily maximum≤ 990 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
Cyanide, total [as CN]monthly average≤ 8 ug/Lall year001
Cyanide, total [as CN]daily maximum≤ 16 ug/Lall year001
Cyanide, total [as CN]monthly average≤ 530 g/dall year001
Cyanide, total [as CN]daily maximum≤ 1000 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≤ 50000 g/dall year001
Iron, total recoverabledaily maximum≤ 100000 g/dall year001
Selenium, total recoverablemonthly average≤ 2 ug/Lall year001
Selenium, total recoverabledaily maximum≤ 3 ug/Lall year001
Selenium, total recoverablemonthly average≤ 100 g/dall year001
Selenium, total recoverabledaily maximum≤ 200 g/dall year001
Boron, total recoverablemonthly average≤ 1000 ug/Lall year001
Boron, total recoverabledaily maximum≤ 1459 ug/Lall year001
Boron, total recoverablemonthly average≤ 66 kg/dall year001
Boron, total recoverabledaily maximum≤ 97 kg/dall year001
Copper, total recoverablemonthly average≤ 18 ug/Lall year001
Copper, total recoverabledaily maximum≤ 36 ug/Lall year001
Copper, total recoverablemonthly average≤ 1200 g/dall year001
Copper, total recoverabledaily maximum≤ 2400 g/dall year001
2,4,6-Trichlorophenolmonthly average≤ 2 ug/Lall year001
2,4,6-Trichlorophenoldaily maximum≤ 4 ug/Lall year001
2,4,6-Trichlorophenolmonthly average≤ 100 g/dall year001
2,4,6-Trichlorophenoldaily maximum≤ 300 g/dall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 3 ug/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 6 ug/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 200 g/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 400 g/dall year001
Chlordane [tech mix. and metabolites]monthly average≤ .0008 ug/Lall year001
Chlordane [tech mix. and metabolites]daily maximum≤ .002 ug/Lall year001
Chlordane [tech mix. and metabolites]monthly average≤ .05 g/dall year001
Chlordane [tech mix. and metabolites]daily maximum≤ .1 g/dall year001
Dieldrinmonthly average≤ .00005 ug/Lall year001
Dieldrindaily maximum≤ .0001 ug/Lall year001
Dieldrinmonthly average≤ .003 g/dall year001
Dieldrindaily maximum≤ .007 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≤ 600 g/dall year001
Chlorine, total residualdaily maximum≤ 1200 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
4-Chloro-3-methylphenolmonthly average≤ 3.8 ug/Lall year001
4-Chloro-3-methylphenoldaily maximum≤ 7.7 ug/Lall year001
4-Chloro-3-methylphenolmonthly average≤ 250 g/dall year001
4-Chloro-3-methylphenoldaily maximum≤ 510 g/dall year001
Hydrogen sulfidemonthly averagereport only (ug/L)all year001
Hydrogen sulfidedaily maximumreport only (ug/L)all year001
Mercury, total recoverablemonthly average≤ .009 ug/Lall year001
Mercury, total recoverabledaily maximum≤ .02 ug/Lall year001
Mercury, total recoverablemonthly average≤ .6 g/dall year001
Mercury, total recoverabledaily maximum≤ 1 g/dall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AZ0020338 · MCP: https://passage-data.com/mcp