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Ash Flat, City of

Sewage treatment plant, Ash Flat, Arkansas. NPDES permit AR0041742, in force until Sep 30, 2027. Last 12 months: over a limit 125 times (last August 2026), 2 required values missing, 6 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (18 values), form Y yearly
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
77 values over a limit, 38 required values missing, 8 of 13 reports late

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

All 125 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], 7-day average59.6 mg/L≤ 15 mg/L297%
October 2025BOD, carbonaceous [5 day, 20 C], monthly average31.31 lb/d≤ 12.5 lb/d150%
October 2025BOD, carbonaceous [5 day, 20 C], monthly average59.4 mg/L≤ 10 mg/L494%
October 2025Coliform, fecal general, 30-day geometric mean> 2000 #/100mL≤ 1000 #/100mL—
October 2025Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 2000 #/100mL—
October 2025Nitrogen, ammonia total [as N], 7-day average29.9 mg/L≤ 5 mg/L498%
October 2025Nitrogen, ammonia total [as N], monthly average15.69 lb/d≤ 6.3 lb/d149%
October 2025Nitrogen, ammonia total [as N], monthly average29.8 mg/L≤ 5 mg/L496%
October 2025Oxygen, dissolved [DO], instantaneous minimum2.28 mg/L≥ 5 mg/L54%
October 2025Solids, total suspended, 7-day average90 mg/L≤ 22.5 mg/L300%
October 2025Solids, total suspended, monthly average33.61 lb/d≤ 18.8 lb/d79%
October 2025Solids, total suspended, monthly average64.5 mg/L≤ 15 mg/L330%
November 2025BOD, carbonaceous [5 day, 20 C], 7-day average88.8 mg/L≤ 15 mg/L492%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average31 lb/d≤ 12.5 lb/d148%
November 2025BOD, carbonaceous [5 day, 20 C], monthly average59.5 mg/L≤ 10 mg/L495%
November 2025Coliform, fecal general, 30-day geometric mean> 2000 #/100mL≤ 1000 #/100mL—
November 2025Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 2000 #/100mL—
November 2025Nitrogen, ammonia total [as N], 7-day average28.6 mg/L≤ 12 mg/L138%
November 2025Nitrogen, ammonia total [as N], monthly average12.98 lb/d≤ 10 lb/d30%
November 2025Nitrogen, ammonia total [as N], monthly average25 mg/L≤ 8 mg/L213%
November 2025Oxygen, dissolved [DO], instantaneous minimum2.13 mg/L≥ 5 mg/L57%
November 2025Solids, total suspended, 7-day average28 mg/L≤ 22.5 mg/L24%
November 2025Solids, total suspended, monthly average22 mg/L≤ 15 mg/L47%
December 2025BOD, carbonaceous [5 day, 20 C], 7-day average85.2 mg/L≤ 15 mg/L468%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average28.09 lb/d≤ 12.5 lb/d125%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average61.5 mg/L≤ 10 mg/L515%
December 2025Coliform, fecal general, 30-day geometric mean> 3578 #/100mL≤ 1000 #/100mL—
December 2025Coliform, fecal general, 7-day geometric mean6400 #/100mL≤ 2000 #/100mL220%
December 2025Nitrogen, ammonia total [as N], 7-day average26 mg/L≤ 12 mg/L117%
December 2025Nitrogen, ammonia total [as N], monthly average12.49 lb/d≤ 10 lb/d25%
December 2025Nitrogen, ammonia total [as N], monthly average25.9 mg/L≤ 8 mg/L224%
December 2025Solids, total suspended, 7-day average78 mg/L≤ 22.5 mg/L247%
December 2025Solids, total suspended, monthly average33.25 lb/d≤ 18.8 lb/d77%
December 2025Solids, total suspended, monthly average70 mg/L≤ 15 mg/L367%
January 2026BOD, carbonaceous [5 day, 20 C], 7-day average45.9 mg/L≤ 15 mg/L206%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average18.98 lb/d≤ 12.5 lb/d52%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average36.4 mg/L≤ 10 mg/L264%
January 2026Coliform, fecal general, 30-day geometric mean> 2059 #/100mL≤ 1000 #/100mL—
January 2026Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 2000 #/100mL—
January 2026Nitrogen, ammonia total [as N], 7-day average24.8 mg/L≤ 12 mg/L107%
January 2026Nitrogen, ammonia total [as N], monthly average12.85 lb/d≤ 10 lb/d29%
January 2026Nitrogen, ammonia total [as N], monthly average24.7 mg/L≤ 8 mg/L209%
January 2026Solids, total suspended, 7-day average55 mg/L≤ 22.5 mg/L144%
January 2026Solids, total suspended, monthly average24.79 lb/d≤ 18.8 lb/d32%
January 2026Solids, total suspended, monthly average47.5 mg/L≤ 15 mg/L217%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average44.7 mg/L≤ 15 mg/L198%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average21.85 lb/d≤ 12.5 lb/d75%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average44.5 mg/L≤ 10 mg/L345%
February 2026Nitrogen, ammonia total [as N], 7-day average24.6 mg/L≤ 12 mg/L105%
February 2026Nitrogen, ammonia total [as N], monthly average11.98 lb/d≤ 10 lb/d20%
February 2026Nitrogen, ammonia total [as N], monthly average24.4 mg/L≤ 8 mg/L205%
February 2026Oxygen, dissolved [DO], instantaneous minimum4.47 mg/L≥ 5 mg/L11%
February 2026Solids, total suspended, 7-day average30 mg/L≤ 22.5 mg/L33%
February 2026Solids, total suspended, monthly average27 mg/L≤ 15 mg/L80%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average165.6 mg/L≤ 15 mg/L1004%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average164.3 mg/L≤ 10 mg/L1543%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average90.79 lb/d≤ 12.5 lb/d626%
March 2026Coliform, fecal general, 30-day geometric mean> 2000 #/100mL≤ 1000 #/100mL—
March 2026Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 2000 #/100mL—
March 2026Nitrogen, ammonia total [as N], 7-day average25.5 mg/L≤ 12 mg/L113%
March 2026Nitrogen, ammonia total [as N], monthly average12.77 lb/d≤ 10 lb/d28%
March 2026Nitrogen, ammonia total [as N], monthly average23.3 mg/L≤ 8 mg/L191%
March 2026Oxygen, dissolved [DO], instantaneous minimum< 1 mg/L≥ 5 mg/L—
March 2026Solids, total suspended, 7-day average933 mg/L≤ 22.5 mg/L4047%
March 2026Solids, total suspended, monthly average328.72 lb/d≤ 18.8 lb/d1649%
March 2026Solids, total suspended, monthly average568.5 mg/L≤ 15 mg/L3690%
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average199.7 mg/L≤ 15 mg/L1231%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average136.8 mg/L≤ 10 mg/L1268%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average87.03 lb/d≤ 12.5 lb/d596%
April 2026Coliform, fecal general, 30-day geometric mean> 2000 #/100mL≤ 1000 #/100mL—
April 2026Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 2000 #/100mL—
April 2026Nitrogen, ammonia total [as N], 7-day average25.3 mg/L≤ 7.8 mg/L224%
April 2026Nitrogen, ammonia total [as N], monthly average13.55 lb/d≤ 9.8 lb/d38%
April 2026Nitrogen, ammonia total [as N], monthly average20 mg/L≤ 7.8 mg/L156%
April 2026Oxygen, dissolved [DO], instantaneous minimum1.36 mg/L≥ 5 mg/L73%
April 2026Solids, total suspended, 7-day average110 mg/L≤ 22.5 mg/L389%
April 2026Solids, total suspended, monthly average53.86 lb/d≤ 18.8 lb/d186%
April 2026Solids, total suspended, monthly average81.5 mg/L≤ 15 mg/L443%
May 2026BOD, carbonaceous [5 day, 20 C], 7-day average112 mg/L≤ 15 mg/L647%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average102.9 mg/L≤ 10 mg/L929%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average68.75 lb/d≤ 12.5 lb/d450%
May 2026Coliform, fecal general, 30-day geometric mean> 5925 #/100mL≤ 200 #/100mL—
May 2026Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 400 #/100mL—
May 2026Nitrogen, ammonia total [as N], 7-day average27 mg/L≤ 5 mg/L440%
May 2026Nitrogen, ammonia total [as N], monthly average17.85 lb/d≤ 6.3 lb/d183%
May 2026Nitrogen, ammonia total [as N], monthly average26.3 mg/L≤ 5 mg/L426%
May 2026Oxygen, dissolved [DO], instantaneous minimum2.1 mg/L≥ 5 mg/L58%
May 2026Solids, total suspended, 7-day average82.5 mg/L≤ 22.5 mg/L267%
May 2026Solids, total suspended, monthly average54.9 lb/d≤ 18.8 lb/d192%
May 2026Solids, total suspended, monthly average81.3 mg/L≤ 15 mg/L442%
June 2026BOD, carbonaceous [5 day, 20 C], 7-day average67.8 mg/L≤ 15 mg/L352%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average38.95 lb/d≤ 12.5 lb/d212%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average64.9 mg/L≤ 10 mg/L549%
June 2026Coliform, fecal general, 30-day geometric mean> 2000 #/100mL≤ 200 #/100mL—
June 2026Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 400 #/100mL—
June 2026Nitrogen, ammonia total [as N], 7-day average21.4 mg/L≤ 5 mg/L328%
June 2026Nitrogen, ammonia total [as N], monthly average10.88 lb/d≤ 6.3 lb/d73%
June 2026Nitrogen, ammonia total [as N], monthly average18.2 mg/L≤ 5 mg/L264%
June 2026Oxygen, dissolved [DO], instantaneous minimum3.57 mg/L≥ 5 mg/L29%
June 2026Solids, total suspended, 7-day average68 mg/L≤ 22.5 mg/L202%
June 2026Solids, total suspended, monthly average39.61 lb/d≤ 18.8 lb/d111%
June 2026Solids, total suspended, monthly average66 mg/L≤ 15 mg/L340%
July 2026BOD, carbonaceous [5 day, 20 C], 7-day average69.8 mg/L≤ 15 mg/L365%
July 2026BOD, carbonaceous [5 day, 20 C], monthly average36.33 lb/d≤ 12.5 lb/d191%
July 2026BOD, carbonaceous [5 day, 20 C], monthly average68.3 mg/L≤ 10 mg/L583%
July 2026Coliform, fecal general, 30-day geometric mean> 2000 #/100mL≤ 200 #/100mL—
July 2026Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 400 #/100mL—
July 2026Nitrogen, ammonia total [as N], 7-day average29 mg/L≤ 5 mg/L480%
July 2026Nitrogen, ammonia total [as N], monthly average12.8 lb/d≤ 6.3 lb/d103%
July 2026Nitrogen, ammonia total [as N], monthly average24.4 mg/L≤ 5 mg/L388%
July 2026Oxygen, dissolved [DO], instantaneous minimum4.16 mg/L≥ 5 mg/L17%
July 2026Solids, total suspended, 7-day average30 mg/L≤ 22.5 mg/L33%
July 2026Solids, total suspended, monthly average25.5 mg/L≤ 15 mg/L70%
August 2026BOD, carbonaceous [5 day, 20 C], 7-day average46.1 mg/L≤ 15 mg/L207%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average26.32 lb/d≤ 12.5 lb/d111%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average45.6 mg/L≤ 10 mg/L356%
August 2026Coliform, fecal general, 30-day geometric mean> 2000 #/100mL≤ 200 #/100mL—
August 2026Coliform, fecal general, 7-day geometric mean> 2000 #/100mL≤ 400 #/100mL—
August 2026Nitrogen, ammonia total [as N], 7-day average77.6 mg/L≤ 5 mg/L1452%
August 2026Nitrogen, ammonia total [as N], monthly average25.97 lb/d≤ 6.3 lb/d312%
August 2026Nitrogen, ammonia total [as N], monthly average47.3 mg/L≤ 5 mg/L846%
August 2026Oxygen, dissolved [DO], instantaneous minimum2.25 mg/L≥ 5 mg/L55%
August 2026Solids, total suspended, 7-day average55 mg/L≤ 22.5 mg/L144%
August 2026Solids, total suspended, monthly average22.12 lb/d≤ 18.8 lb/d18%
August 2026Solids, total suspended, monthly average39.5 mg/L≤ 15 mg/L163%

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
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≤ 18.8 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 8 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 7.8 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 12 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 7.8 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 6.3 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 9.8 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
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Sep
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Sep
Coliform, fecal general7-day geometric mean≤ 2000 #/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≤ 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≤ 12.5 lb/dall year

How strict are these limits?

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

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