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Mount Ida, City of

Sewage treatment plant, Mount Ida, Arkansas. NPDES permit AR0033855 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 11 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (21 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
19 values over a limit, 0 required values missing, 5 of 12 reports late

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

Period endingParameterReportedLimitOver by
February 2026E. coli, 7-day geometric mean> 2420 #/100mL≤ 1490 #/100mL—
March 2026E. coli, 7-day geometric mean> 2420 #/100mL≤ 1490 #/100mL—
April 2026E. coli, 7-day geometric mean> 2420 #/100mL≤ 298 #/100mL—
April 2026E. coli, monthly average> 1152 #/100mL≤ 126 #/100mL—
June 2026E. coli, 7-day geometric mean> 2420 #/100mL≤ 298 #/100mL—
June 2026E. coli, monthly average> 2420 #/100mL≤ 126 #/100mL—
June 2026Oxygen, dissolved [DO], instantaneous minimum4.82 mg/L≥ 6 mg/L20%
July 2026E. coli, 7-day geometric mean1990 #/100mL≤ 298 #/100mL568%
July 2026E. coli, monthly average985 #/100mL≤ 126 #/100mL682%
August 2026E. coli, 7-day geometric mean> 2420 #/100mL≤ 298 #/100mL—
August 2026E. coli, monthly average2046 #/100mL≤ 126 #/100mL1524%

Limits in force (30)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 50 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 20 mg/LMay–Oct
Solids, total suspended7-day average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspended7-day average≤ 30 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 50 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 33.4 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 4.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dMay–Oct
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 plant7-day averagereport only (MGD)all year
E. colimonthly average≤ 630 #/100mLJan, Feb, Mar, Oct, Nov, Dec
E. colimonthly average≤ 126 #/100mLApr–Sep
E. coli7-day geometric mean≤ 1490 #/100mLJan, Feb, Mar, Oct, Nov, Dec
E. coli7-day geometric mean≤ 298 #/100mLApr–Sep
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≤ 12 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 18 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 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/AR0033855 · MCP: https://passage-data.com/mcp