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City Of Somerton

Sewage treatment plant, major discharger, Somerton, Arizona. NPDES permit AZ0026603, in force until Dec 17, 2029. Last 12 months: no values over a limit. 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)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 22 reports late

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
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≤ 204 kg/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 307 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≤ 204 kg/dall year001
Solids, total suspendedweekly average≤ 307 kg/dall year001
Oil & Greasemonthly averagereport only (mg/L)all year001
Oil & Greasedaily maximumreport only (mg/L)all year001
Boron, total recoverablemonthly average≤ 1000 ug/Lall year001
Boron, total recoverabledaily maximum≤ 2000 ug/Lall year001
Boron, total recoverablemonthly average≤ 7000 g/dall year001
Boron, total recoverabledaily maximum≤ 10000 g/dall year001
Cadmium, total recoverablemonthly average≤ 50 ug/Lall year001
Cadmium, total recoverabledaily maximum≤ 140 ug/Lall year001
Cadmium, total recoverablemonthly average≤ 340 g/dall year001
Cadmium, total recoverabledaily maximum≤ 960 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
E. coli, colony forming units [CFU]monthly average≤ 126 CFU/100mLall year001
E. coli, colony forming units [CFU]daily maximum≤ 575 CFU/100mLall 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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AZ0026603 · MCP: https://passage-data.com/mcp