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Central Arizona Water Conservation District

Federal facility (Irrigation Systems), Parker, Arizona. NPDES permit AZ0023990, in force until Feb 13, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: form A monthly (4 values), form Q quarterly (6 values), form S twice a year, form Y yearly
Renewal application due
Aug 17, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 19 reports late

Limits in force (42)

ParameterStatisticLimitMonths
pHminimumreport only (SU)all year
pHminimum≥ 6.5 SUall year
pHmaximumreport only (SU)all year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 40 mg/Lall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasedaily maximum≤ 12 mg/Lall year
Oil & Greasedaily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Arsenic, total recoverabledaily maximumreport only (ug/L)all year
Iron, total recoverablemonthly average≤ 819 ug/Lall year
Iron, total recoverabledaily maximum≤ 1642 ug/Lall year
Iron, total recoverabledaily maximumreport only (ug/L)all year
Selenium, total recoverablemonthly average≤ 2 ug/Lall year
Selenium, total recoverabledaily maximum≤ 3 ug/Lall year
Selenium, total recoverabledaily maximumreport only (ug/L)all year
Thallium, total recoverabledaily maximumreport only (ug/L)all year
Beryllium, total recoverable [as Be]daily maximumreport only (ug/L)all year
Chromium, total [as Cr]daily maximumreport only (ug/L)all year
Nickel, total recoverabledaily maximumreport only (ug/L)all year
Silver total recoverabledaily maximumreport only (ug/L)all year
Zinc, total recoverabledaily maximumreport only (ug/L)all year
Cadmium, total recoverabledaily maximumreport only (ug/L)all year
Lead, total recoverabledaily maximumreport only (ug/L)all year
Copper, total recoverabledaily maximumreport only (ug/L)all year
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year
Antimony, total recoverabledaily maximumreport only (ug/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Solids, total dissolvedmonthly averagereport only (mg/L)all year
Solids, total dissolveddaily maximumreport only (mg/L)all year
Solids, total dissolveddaily maximumreport only (mg/L)all year
Mercury, total recoverablemonthly averagereport only (ug/L)all year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)monthly medianreport only (tox chronic)all year
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximumreport only (tox chronic)all year
Static 7Day Chronic Pimephales Promelasmonthly medianreport only (tox chronic)all year
Static 7Day Chronic Pimephales Promelasdaily maximumreport only (tox chronic)all year
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamonthly medianreport only (tox chronic)all year
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year

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/AZ0023990 · MCP: https://passage-data.com/mcp