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Pleasant Oaks Sewer Improvement District #31

Subdividers And Developers, Mabelvale, Arkansas. NPDES permit AR0041424 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 17 times (last May 2026), 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (20 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
8 values over a limit, 0 required values missing, 4 of 12 reports late

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

All 17 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, monthly average16 mg/L≤ 15 mg/L7%
November 2025BOD, carbonaceous [5 day, 20 C], daily maximum20.6 mg/L≤ 15 mg/L37%
November 2025BOD, carbonaceous [5 day, 20 C], daily maximum3.1 lb/d≤ 2.5 lb/d24%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average19 mg/L≤ 10 mg/L90%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average2.85 lb/d≤ 1.7 lb/d68%
November 2025Nitrogen, ammonia total [as N], daily maximum1.55 lb/d≤ 1.3 lb/d19%
November 2025Nitrogen, ammonia total [as N], daily maximum10.3 mg/L≤ 7.5 mg/L37%
November 2025Nitrogen, ammonia total [as N], monthly average1.54 lb/d≤ .8 lb/d93%
November 2025Nitrogen, ammonia total [as N], monthly average10.25 mg/L≤ 5 mg/L105%
November 2025Solids, total suspended, daily maximum116 mg/L≤ 22.5 mg/L416%
November 2025Solids, total suspended, daily maximum17.41 lb/d≤ 3.8 lb/d358%
November 2025Solids, total suspended, monthly average10.8 lb/d≤ 2.5 lb/d332%
November 2025Solids, total suspended, monthly average71.9 mg/L≤ 15 mg/L379%
March 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
March 2026Solids, total suspended, daily maximum38 mg/L≤ 22.5 mg/L69%
March 2026Solids, total suspended, monthly average22.25 mg/L≤ 15 mg/L48%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average12.1 mg/L≤ 10 mg/L21%

Limits in force (25)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LJan, Feb, Mar, Apr, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 22.5 mg/Lall year
Solids, total suspendedmonthly average≤ 2.5 lb/dall year
Solids, total suspendeddaily maximum≤ 3.8 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LJan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 6.1 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 mg/LJan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .8 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ .8 lb/dJan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 1 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 1.3 lb/dJan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
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
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1.7 lb/dall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 2.5 lb/dall year

How strict are these limits?

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

Same industry: the 50 Real Estate permits in Arkansas.

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Your permit document is the final word. As JSON: /api/v1/permits/AR0041424 · MCP: https://passage-data.com/mcp