Arkansas Department of Parks, Heritage, & Tourism - Devil's Den State Park

NPDES permit AR0037940 · Minor NON-POTW · effective, expires 2028-01-31 · 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

2values over a limit
44required values missing, on 5 form(s)
0of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Chlorine, total residual (2).

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 (39)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Oxygen, dissolved [DO]INST MIN >= 5 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 <= 5 lb/d all year
001Solids, total suspendedDAILY MX <= 7.5 lb/d all year
001Oil & GreaseMO AVG <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Oil & GreaseMO AVG <= 3.3 lb/d all year
001Oil & GreaseDAILY MX <= 5 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 5.3 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 <= 10 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 5.3 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 <= 15 mg/L Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1.8 lb/d Apr
001Nitrogen, ammonia total [as N]MO AVG <= 1.7 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 3.3 lb/d Jan, Feb, Mar, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 1.8 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 2.5 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 5 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 <= 200 #/100mL Jul, Aug, Sep
001Coliform, fecal general30DA GEO <= 1000 #/100mL Oct, Nov, Dec
001Coliform, fecal general30DA GEO <= 200 #/100mL May, Jun
001Coliform, fecal general30DA GEO <= 1000 #/100mL Jan, Feb, Mar, Apr
001Coliform, fecal general7 DA GEO <= 400 #/100mL Jul, Aug, Sep
001Coliform, fecal general7 DA AVG <= 2000 #/100mL Oct, Nov, Dec
001Coliform, fecal general7 DA GEO <= 400 #/100mL May, Jun
001Coliform, fecal general7 DA GEO <= 2000 #/100mL Jan, Feb, Mar, Apr
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 <= 3.3 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 5 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