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University of Arkansas - Rice Research & Extension Center

Noncommercial Research Organizations, Stuttgart, Arkansas. NPDES permit AR0044415, in force until Mar 31, 2028. Last 12 months: over a limit once (last June 2026), 6 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 56 days after each period: form A monthly (2 values), form Q quarterly (8 values), form F quarterly
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 3 of 21 reports late

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

Period endingParameterReportedLimit
June 2026pH, maximum9.8 SU≤ 9 SU

Limits in force (32)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LMay–Oct
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 2.5 lb/dall year
Solids, total suspendeddaily maximum≤ 3.8 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 6 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 9 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .7 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ .8 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.5 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ .7 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 1.8 lb/dJan, Feb, Mar, Nov, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall 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≤ 15 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 23 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 2.5 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1.9 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 3.8 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 2.9 lb/dMay–Oct

How strict are these limits?

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

Same industry: the 3 Engineering, Accounting, Research and Management Services permits in Arkansas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0044415 · MCP: https://passage-data.com/mcp