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Waldron, City of

Sewage treatment plant, Waldron, Arkansas. NPDES permit AR0035769 expired Apr 30, 2026; its limits still apply. Last 12 months: over a limit 8 times (last July 2026), 4 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (36 values), outfall TX1 form Q quarterly (12 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
19 values over a limit, 0 required values missing, 1 of 16 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, total suspended, 7-day average53 mg/L≤ 22.5 mg/L136%
November 2025Solids, total suspended, monthly average28.83 mg/L≤ 15 mg/L92%
April 2026Solids, total suspended, 7-day average45 mg/L≤ 22.5 mg/L100%
April 2026Solids, total suspended, monthly average17.17 mg/L≤ 15 mg/L14%
July 2026Phosphorus, total [as P], 7-day average8.9 mg/L≤ 1.5 mg/L493%
July 2026Phosphorus, total [as P], monthly average4.68 mg/L≤ 1 mg/L368%
July 2026Phosphorus, total [as P], monthly average8.59 lb/d≤ 7.09 lb/d21%
July 2026Solids, total suspended, 7-day average33 mg/L≤ 22.5 mg/L47%

Limits in force (57)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LMay–Oct001
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspended7-day average≤ 22.5 mg/Lall year001
Solids, total suspendedmonthly average≤ 106.3 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 8 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 5.6 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]7-day average≤ 12 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]7-day average≤ 5.6 mg/LApr001
Nitrogen, ammonia total [as N]7-day average≤ 5.6 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 56.7 lb/dJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 39.7 lb/dApr001
Nitrogen, ammonia total [as N]monthly average≤ 35.4 lb/dMay–Oct001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]7-day average≤ 1.5 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 7.09 lb/dall year001
Chloride [as Cl]monthly average≤ 150 mg/Lall year001
Chloride [as Cl]7-day average≤ 225 mg/Lall year001
Chloride [as Cl]monthly average≤ 1063 lb/dall year001
Sulfate, total [as SO4]monthly average≤ 70 mg/Lall year001
Sulfate, total [as SO4]7-day average≤ 105 mg/Lall year001
Sulfate, total [as SO4]monthly average≤ 496 lb/dall year001
Zinc, total recoverablemonthly average≤ 85.5 ug/Lall year001
Zinc, total recoverable7-day average≤ 171.6 ug/Lall year001
Zinc, total recoverablemonthly average≤ .606 lb/dall year001
Copper, total recoverablemonthly average≤ 9.2 ug/Lall year001
Copper, total recoverable7-day average≤ 18.5 ug/Lall year001
Copper, total recoverablemonthly average≤ .065 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Solids, total dissolvedmonthly average≤ 660 mg/Lall year001
Solids, total dissolved7-day average≤ 990 mg/Lall year001
Solids, total dissolvedmonthly average≤ 4679 lb/dall year001
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Sep001
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Sep001
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
Overflowsmonthly totalreport only (occur/mo)all year001
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]7-day average≤ 23 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 106.3 lb/dall year001
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 100 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 80 %all yearTX1
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX1
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1

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/AR0035769 · MCP: https://passage-data.com/mcp