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Myall, LLC

Data Processing And Preparation, Pryor, Oklahoma. NPDES permit OK0100439, in force until Jul 31, 2030. Last 12 months: no values over a limit, 1 of 26 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 1 days after each period: outfall 001 form A monthly (5 values), outfall 002 form A monthly (5 values), outfall 001 form Y yearly, outfall 002 form Y yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 26 reports late

Limits in force (14)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Oxidants, total residualinstantaneous maximum≤ .099 mg/Lall 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, free availablemonthly average≤ .2 mg/Lall year001
Chlorine, free availabledaily maximum≤ .5 mg/Lall year001
pHminimum≥ 6.5 SUall year002
pHmaximum≤ 9 SUall year002
Oxidants, total residualinstantaneous maximum≤ .099 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Chlorine, free availablemonthly average≤ .2 mg/Lall year002
Chlorine, free availabledaily maximum≤ .5 mg/Lall year002

Cited limits by parameter: Oklahoma'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/OK0100439 · MCP: https://passage-data.com/mcp