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Letona, City of

Sewage treatment plant, Letona, Arkansas. NPDES permit AR0049859 expired Jan 31, 2024; its limits still apply. Last 12 months: over a limit 3 times (last June 2026), 3 required values missing, 8 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (4 values), form Q quarterly (11 values), form F quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
5 values over a limit, 11 required values missing, 12 of 19 reports late

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

Period endingParameterReportedLimitOver by
December 2025pH, minimum2.67 SU≥ 6 SU—
March 2026Nitrogen, ammonia total [as N], daily maximum15.6 mg/L≤ 15 mg/L4%
June 2026pH, minimum3.84 SU≥ 6 SU—

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspended7-day average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 3 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5.6 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 5.6 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .8 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ .8 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.5 lb/dJan, Feb, Mar, 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
Coliform, fecal general30-day 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≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 22.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2.2 lb/dall year

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/AR0049859 · MCP: https://passage-data.com/mcp