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WIlton, Town of

Sewage treatment plant, Wilton, Arkansas. NPDES permit AR0040886, in force until Mar 31, 2027. Last 12 months: over a limit 21 times (last July 2026), 72 required values missing, 10 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (18 values)
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
30 values over a limit, 90 required values missing, 9 of 12 reports late

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

All 21 values over a limit
Period endingParameterReportedLimitOver by
November 2025Coliform, fecal general, 7-day geometric mean2406.6 #/100mL≤ 2000 #/100mL20%
November 2025Coliform, fecal general, 7-day geometric mean2406.6 #/100mL≤ 2000 #/100mL20%
November 2025Coliform, fecal general, monthly geometric mean2406.6 #/100mL≤ 1000 #/100mL141%
November 2025Coliform, fecal general, monthly geometric mean2406.6 #/100mL≤ 1000 #/100mL141%
November 2025Solids, total suspended, monthly average22 mg/L≤ 20 mg/L10%
November 2025Solids, total suspended, monthly average22 mg/L≤ 20 mg/L10%
December 2025Solids, total suspended, 7-day average45.8 mg/L≤ 30 mg/L53%
December 2025Solids, total suspended, 7-day average45.8 mg/L≤ 30 mg/L53%
December 2025Solids, total suspended, monthly average19.2 lb/d≤ 15 lb/d28%
December 2025Solids, total suspended, monthly average19.2 lb/d≤ 15 lb/d28%
December 2025Solids, total suspended, monthly average45.8 mg/L≤ 20 mg/L129%
December 2025Solids, total suspended, monthly average45.8 mg/L≤ 20 mg/L129%
February 2026Solids, total suspended, monthly average21 mg/L≤ 20 mg/L5%
February 2026pH, maximum10.3 SU≤ 9 SU—
March 2026Solids, total suspended, monthly average25 mg/L≤ 20 mg/L25%
March 2026Solids, total suspended, monthly average25 mg/L≤ 20 mg/L25%
April 2026Nitrogen, ammonia total [as N], monthly average6.48 lb/d≤ 4.6 lb/d41%
April 2026Solids, total suspended, monthly average18.01 lb/d≤ 15 lb/d20%
May 2026Solids, total suspended, monthly average19 mg/L≤ 15 mg/L27%
June 2026Oxygen, dissolved [DO], instantaneous minimum4.46 mg/L≥ 5 mg/L11%
July 2026Solids, total suspended, monthly average22 mg/L≤ 15 mg/L47%

Limits in force (31)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 3 mg/LJan, Feb, Mar, Apr, Nov, Dec
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LMay–Oct
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspended7-day average≤ 22.5 mg/LMay–Oct
Solids, total suspended7-day average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 11.3 lb/dMay–Oct
Solids, total suspendedmonthly average≤ 15 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.1 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 17 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 6.1 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 3.8 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 9 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 4.6 lb/dApr
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Coliform, fecal generalmonthly geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 23 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 11.3 lb/dMay–Oct

How strict are these limits?

Cited limits by parameter: Arkansas'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/AR0040886 · MCP: https://passage-data.com/mcp