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Bay, City of - Bay WWTF

Sewage treatment plant, Bay, Arkansas. NPDES permit AR0034312, in force until Oct 31, 2030. Last 12 months: over a limit 74 times (last August 2026), 2 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (17 values), form Q quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
21 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 74 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], 7-day average55 mg/L≤ 15 mg/L267%
October 2025BOD, carbonaceous [5 day, 20 C], monthly average33 mg/L≤ 10 mg/L230%
October 2025BOD, carbonaceous [5 day, 20 C], monthly average34.9 lb/d≤ 12.5 lb/d179%
October 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
October 2025Nitrogen, ammonia total [as N], 7-day average27.1 mg/L≤ 12 mg/L126%
October 2025Nitrogen, ammonia total [as N], monthly average21.4 mg/L≤ 8 mg/L168%
October 2025Nitrogen, ammonia total [as N], monthly average22.32 lb/d≤ 10 lb/d123%
October 2025Oxygen, dissolved [DO], instantaneous minimum3.44 mg/L≥ 5 mg/L31%
October 2025Solids, total suspended, 7-day average117 mg/L≤ 22.5 mg/L420%
October 2025Solids, total suspended, monthly average79.3 mg/L≤ 15 mg/L429%
October 2025Solids, total suspended, monthly average83.3 lb/d≤ 18.8 lb/d343%
November 2025Nitrogen, ammonia total [as N], 7-day average17.7 mg/L≤ 13.5 mg/L31%
November 2025Nitrogen, ammonia total [as N], monthly average15.45 mg/L≤ 9 mg/L72%
November 2025Nitrogen, ammonia total [as N], monthly average16.82 lb/d≤ 11.3 lb/d49%
November 2025Oxygen, dissolved [DO], instantaneous minimum5.92 mg/L≥ 6 mg/L1%
December 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100mL≤ 2000 #/100mL—
December 2025Solids, total suspended, 7-day average73.7 mg/L≤ 30 mg/L146%
December 2025Solids, total suspended, monthly average43.35 mg/L≤ 20 mg/L117%
January 2026BOD, carbonaceous [5 day, 20 C], 7-day average194 mg/L≤ 30 mg/L547%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average101.52 mg/L≤ 20 mg/L408%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average102.94 lb/d≤ 25 lb/d312%
January 2026Nitrogen, ammonia total [as N], 7-day average19 mg/L≤ 13.5 mg/L41%
January 2026Nitrogen, ammonia total [as N], monthly average18.55 mg/L≤ 9 mg/L106%
January 2026Nitrogen, ammonia total [as N], monthly average25.9 lb/d≤ 11.3 lb/d129%
January 2026Solids, total suspended, 7-day average154 mg/L≤ 30 mg/L413%
January 2026Solids, total suspended, monthly average84.5 mg/L≤ 20 mg/L323%
January 2026Solids, total suspended, monthly average88.9 lb/d≤ 25 lb/d256%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average24.3 mg/L≤ 20 mg/L22%
February 2026Nitrogen, ammonia total [as N], 7-day average24.9 mg/L≤ 13.5 mg/L84%
February 2026Nitrogen, ammonia total [as N], monthly average12.7 mg/L≤ 9 mg/L41%
February 2026Nitrogen, ammonia total [as N], monthly average14.35 lb/d≤ 11.3 lb/d27%
February 2026Solids, total suspended, 7-day average145 mg/L≤ 30 mg/L383%
February 2026Solids, total suspended, monthly average86.9 mg/L≤ 20 mg/L335%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average68.6 mg/L≤ 30 mg/L129%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average66.1 mg/L≤ 20 mg/L231%
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 average38.7 mg/L≤ 13.5 mg/L187%
March 2026Nitrogen, ammonia total [as N], monthly average35.05 mg/L≤ 9 mg/L289%
March 2026Oxygen, dissolved [DO], instantaneous minimum3.28 mg/L≥ 6 mg/L45%
March 2026Solids, total suspended, 7-day average138 mg/L≤ 30 mg/L360%
March 2026Solids, total suspended, monthly average45.3 lb/d≤ 25 lb/d81%
March 2026Solids, total suspended, monthly average78.5 mg/L≤ 20 mg/L293%
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average68 mg/L≤ 30 mg/L127%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average25.63 lb/d≤ 25 lb/d3%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average37.2 mg/L≤ 20 mg/L86%
April 2026Nitrogen, ammonia total [as N], 7-day average7.72 mg/L≤ 5.2 mg/L48%
April 2026Nitrogen, ammonia total [as N], monthly average6.03 mg/L≤ 5.2 mg/L16%
April 2026Solids, total suspended, 7-day average169 mg/L≤ 30 mg/L463%
April 2026Solids, total suspended, monthly average63.93 lb/d≤ 25 lb/d156%
April 2026Solids, total suspended, monthly average99.5 mg/L≤ 20 mg/L398%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average12.55 mg/L≤ 10 mg/L26%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average13.1 lb/d≤ 12.5 lb/d5%
May 2026Nitrogen, ammonia total [as N], 7-day average28.4 mg/L≤ 12 mg/L137%
May 2026Nitrogen, ammonia total [as N], monthly average28 mg/L≤ 8 mg/L250%
May 2026Nitrogen, ammonia total [as N], monthly average30.42 lb/d≤ 10 lb/d204%
May 2026Oxygen, dissolved [DO], instantaneous minimum4.69 mg/L≥ 5 mg/L6%
May 2026Solids, total suspended, 7-day average23 mg/L≤ 22.5 mg/L2%
May 2026Solids, total suspended, monthly average18 mg/L≤ 15 mg/L20%
June 2026BOD, carbonaceous [5 day, 20 C], 7-day average27.5 mg/L≤ 15 mg/L83%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average14.91 lb/d≤ 12.5 lb/d19%
June 2026BOD, carbonaceous [5 day, 20 C], monthly average17.22 mg/L≤ 10 mg/L72%
June 2026Nitrogen, ammonia total [as N], 7-day average19.1 mg/L≤ 12 mg/L59%
June 2026Nitrogen, ammonia total [as N], monthly average12.5 lb/d≤ 10 lb/d25%
June 2026Nitrogen, ammonia total [as N], monthly average14.04 mg/L≤ 8 mg/L76%
July 2026Nitrogen, ammonia total [as N], 7-day average20.2 mg/L≤ 12 mg/L68%
July 2026Nitrogen, ammonia total [as N], monthly average17.8 lb/d≤ 10 lb/d78%
July 2026Nitrogen, ammonia total [as N], monthly average19.35 mg/L≤ 8 mg/L142%
August 2026Nitrogen, ammonia total [as N], 7-day average28.8 mg/L≤ 12 mg/L140%
August 2026Nitrogen, ammonia total [as N], monthly average15.2 lb/d≤ 10 lb/d52%
August 2026Nitrogen, ammonia total [as N], monthly average19.8 mg/L≤ 8 mg/L148%
August 2026Solids, total suspended, 7-day average72.2 mg/L≤ 22.5 mg/L221%
August 2026Solids, total suspended, monthly average34.03 lb/d≤ 18.8 lb/d81%
August 2026Solids, total suspended, monthly average44.35 mg/L≤ 15 mg/L196%

Limits in force (32)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LJan, Feb, Mar, Apr, Nov, Dec
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LMay–Oct
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspended7-day average≤ 22.5 mg/LMay–Oct
Solids, total suspended7-day average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 18.8 lb/dMay–Oct
Solids, total suspendedmonthly average≤ 25 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 8 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 9 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 12 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 13.5 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 10 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 11.3 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.5 lb/dApr
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)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/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12.5 lb/dMay–Oct

New limits from Nov 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, instantaneous maximum0.011 mg/Lnew2.18 mg/L (11 values)198×

How strict are these limits?

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

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