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Horseshoe Bend, City of

Sewage treatment plant, Horseshoe Bend, Arkansas. NPDES permit AR0035254, in force until Aug 31, 2029. Last 12 months: over a limit once (last June 2026), 4 required values missing, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (27 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 1 of 15 reports late

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

Period endingParameterReportedLimitOver by
June 2026E. coli, 7-day geometric mean602 #/100mL≤ 410 #/100mL47%

Limits in force (34)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 6 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≤ 33.4 lb/dall year
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]monthly average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 10.3 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 8 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 16.6 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.5 lb/dApr
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]7-day averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]7-day averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]7-day averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all 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
E. coli7-day geometric mean≤ 410 #/100mLMay–Sep
E. coli7-day geometric mean≤ 2050 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
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/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 33.4 lb/dall year

New limits from Sep 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.011 mg/Lnew0 mg/L (11 values)0×

How strict are these limits?

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

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/AR0035254 · MCP: https://passage-data.com/mcp