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US Fish & Wildlife Service

Federal facility (Fish Hatcheries And Preserves), Mcnary, Arizona. NPDES permit AZ0000124 expired Sep 30, 2024; its limits still apply. Last 12 months: over a limit 3 times (last June 2026), 24 required values missing, 2 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (12 values), form Q quarterly (5 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 1 of 16 reports late

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

Period endingParameterReportedLimitOver by
December 2025Phosphorus, total [as P], monthly average.22 mg/L≤ .1 mg/L120%
March 2026Phosphorus, total [as P], monthly average.255 mg/L≤ .1 mg/L155%
June 2026Phosphorus, total [as P], monthly average.32 mg/L≤ .1 mg/L220%

Limits in force (17)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendeddaily maximum≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 159 kg/dall year
Solids, total suspendeddaily maximum≤ 238 kg/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1 Ratioall year
Phosphorus, total [as P]monthly average≤ .1 mg/Lall year
Phosphorus, total [as P]daily maximum≤ .8 mg/Lall year
Phosphorus, total [as P]monthly average≤ 1.6 kg/dall year
Phosphorus, total [as P]daily maximum≤ 12.7 kg/dall 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
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year

How strict are these limits?

Cited limits by parameter: Arizona's rules and the federal ones.

Same industry: the 6 Fishing, Hunting and Trapping permits in Arizona.

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/AZ0000124 · MCP: https://passage-data.com/mcp