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Marble Falls Water, Sewer, & Solid Waste Suburban Improvement District No 1 WWTP

Sewage treatment plant, Marble Falls, Arkansas. NPDES permit AR0034088, in force until Jun 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A3 monthly (9 values), form F3 quarterly, form Q1 quarterly, form Q3 quarterly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 10 of 25 reports late

Limits in force (37)

ParameterStatisticLimitMonths
Flow ratemonthly averagereport only (%)all year
Flow rate7-day averagereport only (%)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LMay–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LJan, Feb, Mar, Apr, Nov, Dec
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspended7-day average≤ 22.5 mg/Lall year
Solids, total suspendedmonthly average≤ 1.9 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5.3 ug/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 5.3 ug/Lall year
Nitrogen, ammonia total [as N]7-day averagereport only (mg/L)May–Oct
Nitrogen, ammonia total [as N]7-day average≤ 15 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .7 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ .6 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.3 lb/dJan, Feb, Mar, Nov, Dec
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 average≤ 1 mg/Lall year
Phosphorus, total [as P]7-day average≤ 1.5 mg/Lall year
Phosphorus, total [as P]monthly average≤ .13 lb/dall 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
E. colimonthly geometric mean≤ 126 #/100mLall year
E. coli7-day geometric mean≤ 410 #/100mLall year
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLOct–Dec
Coliform, fecal general30-day geometric mean≤ 200 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLOct–Dec
Coliform, fecal general7-day geometric mean≤ 400 #/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≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1.3 lb/dall year

New limits from Jul 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
BOD, carbonaceous [5 day, 20 C], monthly average0.8 lb/dtighter——
Nitrogen, ammonia total [as N], monthly average0.42 lb/d (May–Oct)tighter——
Solids, total suspended, monthly average1.3 lb/dtighter——

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0034088 · MCP: https://passage-data.com/mcp