US National Parks Service - Arkansas Post National Memorial

NPDES permit AR0052671 · Minor FEDERAL · effective, expires 2028-04-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
1of 20 forms filed late

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

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (29)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Oxygen, dissolved [DO]INST MIN >= 4 mg/L May, Jun, Jul, Aug, Sep, Oct
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 <= .3 lb/d all year
001Solids, total suspendedDAILY MX <= .4 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L Apr
001Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.2 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 7.5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 7.5 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .09 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= .09 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= .09 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= .09 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= .1 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= .1 lb/d Jan, Feb, Mar, Nov, Dec
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 <= .011 mg/L all year
001Coliform, fecal general30DA GEO <= 1000 #/100mL all year
001Coliform, fecal general7 DA GEO <= 2000 #/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 <= .2 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= .3 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