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Lincoln, City of

Sewage treatment plant, Lincoln, Arkansas. NPDES permit AR0035246, in force until Sep 30, 2030. Last 12 months: over a limit 6 times (last September 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

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

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

Period endingParameterReportedLimitOver by
June 2026Solids, total suspended, monthly average106 lb/d≤ 62.6 lb/d69%
August 2026Coliform, fecal general, 7-day geometric mean649 #/100mL≤ 400 #/100mL62%
August 2026Nitrogen, ammonia total [as N], 7-day average11.6 mg/L≤ 3.9 mg/L197%
August 2026Nitrogen, ammonia total [as N], monthly average10.1 mg/L≤ 3.9 mg/L159%
September 2026Nitrogen, ammonia total [as N], 7-day average8.3 mg/L≤ 3.9 mg/L113%
September 2026Nitrogen, ammonia total [as N], monthly average< 4.4 mg/L≤ 3.9 mg/L13%

Limits in force (29)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/LJan, Feb, Mar, Apr, Nov, Dec
Oxygen, dissolved [DO]instantaneous minimum≥ 3 mg/LMay–Oct
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspended7-day average≤ 22.5 mg/Lall year
Solids, total suspendedmonthly average≤ 62.6 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 3.9 mg/LApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 8 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 3.9 mg/LApr–Oct
Nitrogen, ammonia total [as N]7-day average≤ 10.3 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 16.3 lb/dApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 33.4 lb/dJan, Feb, Mar, Nov, Dec
Nitrite + Nitrate total [as N]monthly average≤ 10 mg/Lall year
Nitrite + Nitrate total [as N]7-day average≤ 10 mg/Lall year
Nitrite + Nitrate total [as N]monthly average≤ 41.7 lb/dall year
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]7-day average≤ 1.5 mg/Lall year
Phosphorus, total [as P]monthly average≤ 4.2 lb/dall 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 maximumreport only (mg/L)all year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 400 #/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≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 41.7 lb/dall year

New limits from Oct 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.011 mg/Lnew0.0115 mg/L (12 values)1.05×

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/AR0035246 · MCP: https://passage-data.com/mcp