USDA - Harry K. Dupree Stuttgart National Aquaculture Research Center

NPDES permit AR0049352 · Minor FEDERAL · effective, expires 2028-03-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 18 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among AR permits in EPA's filings — check your permit).

Limits in force (62)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 3 mg/L May, Jun, Jul, Aug, Sep, Oct
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 22.5 mg/L all year
001Solids, total suspendedMO AVG <= 10.8 lb/d all year
001Solids, total suspendedDAILY MX <= 16.1 lb/d all year
001Oil & GreaseMO AVG <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Oil & GreaseMO AVG <= 7.2 lb/d all year
001Oil & GreaseDAILY MX <= 10.8 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 5.2 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 7 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 5.2 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 5.2 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 10.5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 7.8 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 3.7 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 5 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 3.7 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 3.7 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 7.5 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.6 lb/d May, Jun, Jul, Aug, Sep, Oct
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualINST MAX report only all year
001E. coli30DA GEO <= 630 #/100mL all year
001E. coli7 DA GEO <= 2050 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 15 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 7.2 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 10.8 lb/d all year
002Oxygen, dissolved [DO]INST MIN >= 3 mg/L May, Jun, Jul, Aug, Sep, Oct
002Oxygen, dissolved [DO]INST MIN >= 5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 15 mg/L all year
002Solids, total suspendedDAILY MX <= 22.5 mg/L all year
002Solids, total suspendedMO AVG <= .13 lb/d all year
002Solids, total suspendedDAILY MX <= .19 lb/d all year
002Oil & GreaseMO AVG <= 10 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Oil & GreaseMO AVG <= .083 lb/d all year
002Oil & GreaseDAILY MX <= .13 lb/d all year
002Nitrogen, ammonia total [as N]MO AVG <= 5.2 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 7 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 7.8 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 10.5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]MO AVG <= .43 lb/d May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= .058 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= .065 lb/d May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]DAILY MX <= .088 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualINST MAX report only all year
002E. coli30DA GEO <= 630 #/100mL all year
002E. coli7 DA GEO <= 2050 #/100mL all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 15 mg/L all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= .083 lb/d all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= .13 lb/d all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states