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Wright City, Town of (PWA)

Sewage treatment plant, Mccurtain County, Oklahoma. NPDES permit OK0032387, in force until Aug 31, 2028. Last 12 months: over a limit 54 times (last August 2026), 17 required values missing, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (17 values)
Renewal application due
Mar 4, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
56 values over a limit, 0 required values missing, 3 of 12 reports late

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

All 54 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, carbonaceous [5 day, 20 C], monthly average5.62 mg/L≤ 5 mg/L12%
October 2025BOD, carbonaceous [5 day, 20 C], weekly average9.11 mg/L≤ 7.5 mg/L21%
October 2025Chlorine, total residual, instantaneous maximum1.71 mg/L≤ .099 mg/L1627%
October 2025Nitrogen, ammonia total [as N], monthly average2.5 lb/d≤ 1.17 lb/d114%
October 2025Nitrogen, ammonia total [as N], monthly average9.9 mg/L≤ 1 mg/L890%
October 2025Nitrogen, ammonia total [as N], weekly average16 mg/L≤ 1.5 mg/L967%
October 2025Oxygen, dissolved [DO], monthly minimum3.68 mg/L≥ 6 mg/L39%
October 2025Solids, total suspended, monthly average14.8 mg/L≤ 10 mg/L48%
October 2025Solids, total suspended, weekly average19 mg/L≤ 15 mg/L27%
October 2025pH, minimum5.87 SU≥ 6.5 SU—
November 2025BOD, 5-day, 20 deg. C, monthly average> 23.9 mg/L≤ 20 mg/L—
November 2025BOD, 5-day, 20 deg. C, monthly average> 5.5 lb/d≤ 23.4 lb/d—
November 2025BOD, 5-day, 20 deg. C, weekly average> 34.9 mg/L≤ 30 mg/L—
November 2025Chlorine, total residual, instantaneous maximum2.2 mg/L≤ .099 mg/L2122%
December 2025BOD, 5-day, 20 deg. C, monthly average22 mg/L≤ 20 mg/L10%
December 2025Chlorine, total residual, instantaneous maximum1.76 mg/L≤ .099 mg/L1678%
January 2026BOD, 5-day, 20 deg. C, monthly average26.8 mg/L≤ 20 mg/L34%
January 2026Chlorine, total residual, instantaneous maximum1.01 mg/L≤ .099 mg/L920%
January 2026pH, minimum6.1 SU≥ 6.5 SU—
February 2026BOD, 5-day, 20 deg. C, monthly average42.2 mg/L≤ 20 mg/L111%
February 2026BOD, 5-day, 20 deg. C, weekly average63 mg/L≤ 30 mg/L110%
February 2026Chlorine, total residual, instantaneous maximum.96 mg/L≤ .099 mg/L870%
February 2026pH, maximum11.29 SU≤ 9 SU—
February 2026pH, minimum6.46 SU≥ 6.5 SU—
March 2026Chlorine, total residual, instantaneous maximum.51 mg/L≤ .099 mg/L415%
March 2026pH, minimum6.31 SU≥ 6.5 SU—
April 2026BOD, 5-day, 20 deg. C, monthly average29.6 mg/L≤ 20 mg/L48%
April 2026BOD, 5-day, 20 deg. C, weekly average41.2 mg/L≤ 30 mg/L37%
April 2026Chlorine, total residual, instantaneous maximum.44 mg/L≤ .099 mg/L344%
May 2026BOD, 5-day, 20 deg. C, monthly average20.8 mg/L≤ 20 mg/L4%
May 2026Chlorine, total residual, instantaneous maximum1.6 mg/L≤ .099 mg/L1516%
May 2026E. coli, daily maximum> 20000 CFU/100mL≤ 406 CFU/100mL—
May 2026E. coli, geometric mean> 1149 CFU/100mL≤ 126 CFU/100mL—
May 2026Solids, total suspended, monthly average32 mg/L≤ 30 mg/L7%
May 2026pH, minimum6.36 SU≥ 6.5 SU—
June 2026BOD, carbonaceous [5 day, 20 C], monthly average6.61 mg/L≤ 5 mg/L32%
June 2026BOD, carbonaceous [5 day, 20 C], weekly average7.93 mg/L≤ 7.5 mg/L6%
June 2026Chlorine, total residual, instantaneous maximum2.2 mg/L≤ .099 mg/L2122%
June 2026E. coli, daily maximum9636 CFU/100mL≤ 406 CFU/100mL2273%
June 2026E. coli, geometric mean547 CFU/100mL≤ 126 CFU/100mL334%
June 2026Nitrogen, ammonia total [as N], monthly average10.6 mg/L≤ 1 mg/L960%
June 2026Nitrogen, ammonia total [as N], monthly average2.7 lb/d≤ 1.17 lb/d131%
June 2026Nitrogen, ammonia total [as N], weekly average11.3 mg/L≤ 1.5 mg/L653%
June 2026pH, minimum6.11 SU≥ 6.5 SU—
August 2026BOD, carbonaceous [5 day, 20 C], monthly average9.8 mg/L≤ 5 mg/L96%
August 2026BOD, carbonaceous [5 day, 20 C], weekly average10.4 mg/L≤ 7.5 mg/L39%
August 2026Chlorine, total residual, instantaneous maximum2.2 mg/L≤ .099 mg/L2122%
August 2026E. coli, daily maximum41000 CFU/100mL≤ 406 CFU/100mL9999%
August 2026Nitrogen, ammonia total [as N], monthly average17.2 mg/L≤ 1 mg/L1620%
August 2026Nitrogen, ammonia total [as N], monthly average3.7 lb/d≤ 1.17 lb/d216%
August 2026Nitrogen, ammonia total [as N], weekly average20.1 mg/L≤ 1.5 mg/L1240%
August 2026Oxygen, dissolved [DO], monthly minimum.61 mg/L≥ 6 mg/L90%
August 2026Solids, total suspended, monthly average11.2 mg/L≤ 10 mg/L12%
August 2026pH, minimum6.21 SU≥ 6.5 SU—

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 6 mg/LJun–Oct
Oxygen, dissolved [DO]monthly minimum≥ 3 mg/LApr, May
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 23.4 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedmonthly average≤ 10 mg/LJun–Oct
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedweekly average≤ 15 mg/LJun–Oct
Solids, total suspendedmonthly average≤ 35 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedmonthly average≤ 11.7 lb/dJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LJun–Oct
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.17 lb/dJun–Oct
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 maximum≤ .099 mg/Lall year
E. coligeometric mean≤ 126 CFU/100mLMay–Sep
E. colidaily maximum≤ 406 CFU/100mLMay–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 7.5 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5.84 lb/dJun–Oct

How strict are these limits?

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

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