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Central Arkansas Water - Jack H. Wilson Water Treatment Plant

Water Supply, Little Rock, Arkansas. NPDES permit AR0047937, in force until Sep 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (2 values), form Q quarterly (11 values)
Renewal application due
Apr 3, 2027 · 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 16 reports late

Limits in force (13)

ParameterStatisticLimitMonths
Oxygen demand, chem. [low level] [COD]monthly average≤ 50 mg/Lall year
Oxygen demand, chem. [low level] [COD]daily maximum≤ 75 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasedaily maximum≤ 15 mg/Lall year
Aluminum, dissolved [as Al]monthly average≤ 1 mg/Lall year
Aluminum, dissolved [as Al]daily maximum≤ 2 mg/Lall 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
Chlorine, total residualinstantaneous maximum≤ .011 mg/Lall year

How strict are these limits?

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

Same industry: the 9 Water Supply permits in Arkansas.

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/AR0047937 · MCP: https://passage-data.com/mcp