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Cave City, City of

Sewage treatment plant, Cave City, Arkansas. NPDES permit AR0022110, in force until Apr 30, 2029. Last 12 months: over a limit 2 times (last January 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A1 monthly (22 values), form A2 monthly (22 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
January 2026Solids, total suspended, 7-day average56 mg/L≤ 30 mg/L87%
January 2026Solids, total suspended, monthly average28.5 mg/L≤ 20 mg/L43%

Limits in force (72)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/LMar, Apr
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 8 mg/LJan, Feb, Nov, Dec
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/LMar, Apr
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 8 mg/LJan, Feb, Nov, Dec
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/LMar–Oct
Solids, total suspendedmonthly average≤ 20 mg/LJan, Feb, Nov, Dec
Solids, total suspended7-day average≤ 22.5 mg/Lall year
Solids, total suspended7-day average≤ 22.5 mg/LMar–Oct
Solids, total suspended7-day average≤ 30 mg/LJan, Feb, Nov, Dec
Solids, total suspendedmonthly average≤ 56.3 lb/dall year
Solids, total suspendedmonthly average≤ 56.3 lb/dMar–Oct
Solids, total suspendedmonthly average≤ 75.1 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMar
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMar
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMar
Nitrogen, ammonia total [as N]7-day average≤ 4.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 10.3 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMar
Nitrogen, ammonia total [as N]7-day average≤ 4.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 10.3 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 18.8 lb/dMar
Nitrogen, ammonia total [as N]monthly average≤ 11.3 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 37.5 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 14.6 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 18.8 lb/dMar
Nitrogen, ammonia total [as N]monthly average≤ 11.3 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 37.5 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 14.6 lb/dApr
Nitrite + Nitrate total [as N]monthly average≤ 10 mg/Lall year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]7-day average≤ 10 mg/Lall year
Nitrite + Nitrate total [as N]7-day averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly average≤ 3.8 lb/dall year
Nitrite + Nitrate total [as N]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 plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .011 mg/Lall year
Chlorine, total residualinstantaneous maximum≤ .011 mg/Lall year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLall year
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 400 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
Overflowsmonthly totalreport only (occur/mo)all year
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)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]monthly average≤ 10 mg/LMar–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/LMar–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/LJan, Feb, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 37.5 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 37.5 lb/dMar–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 75.1 lb/dJan, Feb, Nov, Dec

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/AR0022110 · MCP: https://passage-data.com/mcp