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Lamar, City of

Sewage treatment plant, Lamar, Arkansas. NPDES permit AR0035491, in force until Jun 30, 2029. Last 12 months: over a limit 61 times (last August 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (15 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 61 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, 7-day average32 mg/L≤ 22.5 mg/L42%
October 2025Solids, total suspended, monthly average31 mg/L≤ 15 mg/L107%
November 2025BOD, 5-day, 20 deg. C, 7-day average32 mg/L≤ 15 mg/L113%
November 2025BOD, 5-day, 20 deg. C, monthly average10.484 lb/d≤ 8.8 lb/d19%
November 2025BOD, 5-day, 20 deg. C, monthly average19.4 mg/L≤ 10 mg/L94%
November 2025Solids, total suspended, 7-day average230 mg/L≤ 22.5 mg/L922%
November 2025Solids, total suspended, monthly average164 mg/L≤ 15 mg/L993%
November 2025Solids, total suspended, monthly average92.687 lb/d≤ 13 lb/d613%
January 2026BOD, 5-day, 20 deg. C, monthly average11.5 mg/L≤ 10 mg/L15%
January 2026Coliform, fecal general, 7-day geometric mean10900 #/100mL≤ 2000 #/100mL445%
February 2026BOD, 5-day, 20 deg. C, 7-day average27 mg/L≤ 15 mg/L80%
February 2026BOD, 5-day, 20 deg. C, monthly average11.845 lb/d≤ 8.8 lb/d35%
February 2026BOD, 5-day, 20 deg. C, monthly average23.5 mg/L≤ 10 mg/L135%
February 2026Coliform, fecal general, 30-day geometric mean1861 #/100mL≤ 1000 #/100mL86%
February 2026Coliform, fecal general, 7-day geometric mean2534 #/100mL≤ 2000 #/100mL27%
February 2026Solids, total suspended, 7-day average32 mg/L≤ 22.5 mg/L42%
February 2026Solids, total suspended, monthly average25 mg/L≤ 15 mg/L67%
March 2026BOD, 5-day, 20 deg. C, 7-day average110 mg/L≤ 15 mg/L633%
March 2026BOD, 5-day, 20 deg. C, monthly average63.8 lb/d≤ 8.8 lb/d625%
March 2026BOD, 5-day, 20 deg. C, monthly average79 mg/L≤ 10 mg/L690%
March 2026Coliform, fecal general, 30-day geometric mean4537 #/100mL≤ 1000 #/100mL354%
March 2026Coliform, fecal general, 7-day geometric mean9800 #/100mL≤ 2000 #/100mL390%
April 2026BOD, 5-day, 20 deg. C, 7-day average28 mg/L≤ 15 mg/L87%
April 2026BOD, 5-day, 20 deg. C, monthly average11.5 lb/d≤ 8.8 lb/d31%
April 2026BOD, 5-day, 20 deg. C, monthly average21 mg/L≤ 10 mg/L110%
April 2026Coliform, fecal general, 30-day geometric mean1933 #/100mL≤ 1000 #/100mL93%
April 2026Coliform, fecal general, 7-day geometric mean2800 #/100mL≤ 2000 #/100mL40%
April 2026Solids, total suspended, 7-day average31 mg/L≤ 22.5 mg/L38%
April 2026Solids, total suspended, monthly average21 mg/L≤ 15 mg/L40%
May 2026BOD, 5-day, 20 deg. C, 7-day average17 mg/L≤ 15 mg/L13%
May 2026BOD, 5-day, 20 deg. C, monthly average15 mg/L≤ 10 mg/L50%
May 2026Coliform, fecal general, 30-day geometric mean44080 #/100mL≤ 1000 #/100mL4308%
May 2026Coliform, fecal general, 7-day geometric mean55200 #/100mL≤ 2000 #/100mL2660%
May 2026Solids, total suspended, 7-day average25 mg/L≤ 22.5 mg/L11%
May 2026Solids, total suspended, monthly average24 mg/L≤ 15 mg/L60%
June 2026BOD, 5-day, 20 deg. C, 7-day average32 mg/L≤ 15 mg/L113%
June 2026BOD, 5-day, 20 deg. C, monthly average24 mg/L≤ 10 mg/L140%
June 2026BOD, 5-day, 20 deg. C, monthly average9.4 lb/d≤ 8.8 lb/d7%
June 2026Coliform, fecal general, 30-day geometric mean3047 #/100mL≤ 1000 #/100mL205%
June 2026Coliform, fecal general, 7-day geometric mean57300 #/100mL≤ 2000 #/100mL2765%
June 2026Solids, total suspended, 7-day average81 mg/L≤ 22.5 mg/L260%
June 2026Solids, total suspended, monthly average20.509 lb/d≤ 13 lb/d58%
June 2026Solids, total suspended, monthly average53 mg/L≤ 15 mg/L253%
July 2026BOD, 5-day, 20 deg. C, 7-day average30 mg/L≤ 15 mg/L100%
July 2026BOD, 5-day, 20 deg. C, monthly average24 lb/d≤ 8.8 lb/d173%
July 2026BOD, 5-day, 20 deg. C, monthly average24 mg/L≤ 10 mg/L140%
July 2026Coliform, fecal general, 30-day geometric mean10229 #/100mL≤ 1000 #/100mL923%
July 2026Coliform, fecal general, 7-day geometric mean32700 #/100mL≤ 2000 #/100mL1535%
July 2026Oxygen, dissolved [DO], instantaneous minimum4.36 mg/L≥ 5 mg/L13%
July 2026Solids, total suspended, 7-day average53 mg/L≤ 22.5 mg/L136%
July 2026Solids, total suspended, monthly average44.257 lb/d≤ 13 lb/d240%
July 2026Solids, total suspended, monthly average48 mg/L≤ 15 mg/L220%
August 2026BOD, 5-day, 20 deg. C, 7-day average26 mg/L≤ 15 mg/L73%
August 2026BOD, 5-day, 20 deg. C, monthly average11.6 lb/d≤ 8.8 lb/d32%
August 2026BOD, 5-day, 20 deg. C, monthly average17 mg/L≤ 10 mg/L70%
August 2026Coliform, fecal general, 30-day geometric mean5880 #/100mL≤ 1000 #/100mL488%
August 2026Coliform, fecal general, 7-day geometric mean18200 #/100mL≤ 2000 #/100mL810%
August 2026Oxygen, dissolved [DO], instantaneous minimum4.16 mg/L≥ 5 mg/L17%
August 2026Solids, total suspended, 7-day average37 mg/L≤ 22.5 mg/L64%
August 2026Solids, total suspended, monthly average17.353 lb/d≤ 13 lb/d33%
August 2026Solids, total suspended, monthly average35 mg/L≤ 15 mg/L133%

Limits in force (15)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 8.8 lb/dall 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≤ 13 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
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year

How strict are these limits?

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

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