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Poyen, City of

Sewage treatment plant, Poyen, Arkansas. NPDES permit AR0048445 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 45 times (last August 2026), 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (18 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 18 required values missing, 1 of 12 reports late

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

All 45 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], 7-day average20 mg/L≤ 6 mg/L233%
October 2025Nitrogen, ammonia total [as N], monthly average13.34 lb/d≤ 1.8 lb/d641%
October 2025Nitrogen, ammonia total [as N], monthly average20 mg/L≤ 4 mg/L400%
November 2025Nitrogen, ammonia total [as N], 7-day average22.7 mg/L≤ 17 mg/L34%
November 2025Nitrogen, ammonia total [as N], monthly average15.15 lb/d≤ 5.5 lb/d175%
November 2025Nitrogen, ammonia total [as N], monthly average22.7 mg/L≤ 12 mg/L89%
November 2025Solids, total suspended, monthly average11 lb/d≤ 9.2 lb/d20%
December 2025Nitrogen, ammonia total [as N], 7-day average19.7 mg/L≤ 17 mg/L16%
December 2025Nitrogen, ammonia total [as N], monthly average13.14 lb/d≤ 5.5 lb/d139%
December 2025Nitrogen, ammonia total [as N], monthly average19.7 mg/L≤ 12 mg/L64%
December 2025Solids, total suspended, monthly average11.3 lb/d≤ 9.2 lb/d23%
February 2026Nitrogen, ammonia total [as N], 7-day average22.9 mg/L≤ 17 mg/L35%
February 2026Nitrogen, ammonia total [as N], monthly average15.3 lb/d≤ 5.5 lb/d178%
February 2026Nitrogen, ammonia total [as N], monthly average22.9 mg/L≤ 12 mg/L91%
February 2026Solids, total suspended, monthly average13.34 lb/d≤ 9.2 lb/d45%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average35 mg/L≤ 30 mg/L17%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average23.35 lb/d≤ 9.2 lb/d154%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average35 mg/L≤ 20 mg/L75%
March 2026Coliform, fecal general, 30-day geometric mean> 2420 #/100mL≤ 1000 #/100mL—
March 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
March 2026Nitrogen, ammonia total [as N], 7-day average22.2 mg/L≤ 17 mg/L31%
March 2026Nitrogen, ammonia total [as N], monthly average14.81 lb/d≤ 5.5 lb/d169%
March 2026Nitrogen, ammonia total [as N], monthly average22.2 mg/L≤ 12 mg/L85%
March 2026Solids, total suspended, 7-day average126 mg/L≤ 30 mg/L320%
March 2026Solids, total suspended, monthly average126 mg/L≤ 20 mg/L530%
March 2026Solids, total suspended, monthly average84.07 lb/d≤ 9.2 lb/d814%
April 2026Nitrogen, ammonia total [as N], 7-day average19.9 mg/L≤ 6.1 mg/L226%
April 2026Nitrogen, ammonia total [as N], monthly average13.3 lb/d≤ 2.8 lb/d375%
April 2026Nitrogen, ammonia total [as N], monthly average19.9 mg/L≤ 6.1 mg/L226%
May 2026Nitrogen, ammonia total [as N], 7-day average19.1 mg/L≤ 6 mg/L218%
May 2026Nitrogen, ammonia total [as N], monthly average12.74 lb/d≤ 1.8 lb/d608%
May 2026Nitrogen, ammonia total [as N], monthly average19.1 mg/L≤ 4 mg/L378%
May 2026Solids, total suspended, 7-day average32 mg/L≤ 30 mg/L7%
May 2026Solids, total suspended, monthly average21.35 lb/d≤ 9.2 lb/d132%
May 2026Solids, total suspended, monthly average32 mg/L≤ 20 mg/L60%
June 2026Solids, total suspended, 7-day average174 mg/L≤ 30 mg/L480%
June 2026Solids, total suspended, monthly average116.1 lb/d≤ 9.2 lb/d1162%
June 2026Solids, total suspended, monthly average174 mg/L≤ 20 mg/L770%
July 2026Nitrogen, ammonia total [as N], 7-day average18.9 mg/L≤ 6 mg/L215%
July 2026Nitrogen, ammonia total [as N], monthly average12.61 lb/d≤ 1.8 lb/d601%
July 2026Nitrogen, ammonia total [as N], monthly average18.9 mg/L≤ 4 mg/L373%
July 2026Solids, total suspended, 7-day average35 mg/L≤ 30 mg/L17%
July 2026Solids, total suspended, monthly average23.35 lb/d≤ 9.2 lb/d154%
July 2026Solids, total suspended, monthly average35 mg/L≤ 20 mg/L75%
August 2026Solids, total suspended, monthly average12.7 lb/d≤ 9.2 lb/d38%

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 2 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≤ 9.2 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.1 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 17 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 6.1 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 6 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5.5 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2.8 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 1.8 lb/dMay–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD) (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)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
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≤ 9.2 lb/dall year

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/AR0048445 · MCP: https://passage-data.com/mcp