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Oxford, City of

Sewage treatment plant, Oxford, Arkansas. NPDES permit AR0049701 expired Apr 30, 2025; its limits still apply. Last 12 months: over a limit 19 times (last June 2026), 2 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (19 values), form Q quarterly (9 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
23 values over a limit, 0 required values missing, 9 of 16 reports late

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

All 19 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], 7-day average17.2 mg/L≤ 7.5 mg/L129%
October 2025Nitrogen, ammonia total [as N], monthly average17.2 mg/L≤ 5 mg/L244%
November 2025Nitrogen, ammonia total [as N], 7-day average26.7 mg/L≤ 10.3 mg/L159%
November 2025Nitrogen, ammonia total [as N], monthly average26.7 mg/L≤ 10 mg/L167%
December 2025Coliform, fecal general, 30-day geometric mean1012 #/100mL≤ 1000 #/100mL1%
December 2025Nitrogen, ammonia total [as N], 7-day average22.8 mg/L≤ 10.3 mg/L121%
December 2025Nitrogen, ammonia total [as N], monthly average22.8 mg/L≤ 10 mg/L128%
January 2026Nitrogen, ammonia total [as N], 7-day average22.4 mg/L≤ 10.3 mg/L117%
January 2026Nitrogen, ammonia total [as N], monthly average22.4 mg/L≤ 10 mg/L124%
February 2026Nitrogen, ammonia total [as N], 7-day average12.6 mg/L≤ 10.3 mg/L22%
February 2026Nitrogen, ammonia total [as N], monthly average12.6 mg/L≤ 10 mg/L26%
March 2026Nitrogen, ammonia total [as N], 7-day average12.3 mg/L≤ 10.3 mg/L19%
March 2026Nitrogen, ammonia total [as N], monthly average12.3 mg/L≤ 10 mg/L23%
April 2026Nitrogen, ammonia total [as N], 7-day average4.8 mg/L≤ 3.9 mg/L23%
April 2026Nitrogen, ammonia total [as N], monthly average4.8 mg/L≤ 3.9 mg/L23%
May 2026Nitrogen, ammonia total [as N], 7-day average13 mg/L≤ 7.5 mg/L73%
May 2026Nitrogen, ammonia total [as N], monthly average13 mg/L≤ 5 mg/L160%
June 2026Nitrogen, ammonia total [as N], 7-day average21 mg/L≤ 7.5 mg/L180%
June 2026Nitrogen, ammonia total [as N], monthly average21 mg/L≤ 5 mg/L320%

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 3 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec
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≤ 15.5 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 3.9 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 10.3 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 7.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 3 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 7.7 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 3.9 lb/dMay–Oct
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
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≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 23 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 11.6 lb/dall year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0049701 · MCP: https://passage-data.com/mcp