Little Rock, City of-Little Rock Zoological Gardens

NPDES permit AR0037745 · Minor NON-POTW · administratively continued, expires 2026-05-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2026-05-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

5values over a limit
0required values missing, on 0 form(s)
6of 38 forms filed late

Last period with anything received: 2026-07-31. Most often over: Chlorine, total residual (4), Oxygen, dissolved [DO] (1).

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 (32)

OutfallParameterStatisticLimitMonths
002Oxygen, dissolved [DO]INST MIN >= 2 mg/L May, Jun, Jul, Aug, Sep, Oct
002Oxygen, dissolved [DO]INST MIN >= 6 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Oxygen demand, chem. [low level] [COD]MO AVG <= 50 mg/L all year
002Oxygen demand, chem. [low level] [COD]DAILY MX <= 75 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 50 mg/L all year
002Solids, total suspendedDAILY MX <= 75 mg/L all year
002Oil & GreaseMO AVG <= 10 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
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 <= .011 mg/L all year
002Peracetic AcidINST MAX <= 1 mg/L all year
002Coliform, fecal general30DA GEO <= 1000 #/100mL all year
002Coliform, fecal general7 DA GEO <= 2000 #/100mL all year
004Oxygen, dissolved [DO]INST MIN >= 2 mg/L May, Jun, Jul, Aug, Sep, Oct
004Oxygen, dissolved [DO]INST MIN >= 6 mg/L Jan, Feb, Mar, Apr, Nov, Dec
004Oxygen demand, chem. [low level] [COD]MO AVG <= 50 mg/L all year
004Oxygen demand, chem. [low level] [COD]DAILY MX <= 75 mg/L all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedMO AVG <= 50 mg/L all year
004Solids, total suspendedDAILY MX <= 75 mg/L all year
004Oil & GreaseMO AVG <= 10 mg/L all year
004Oil & GreaseDAILY MX <= 15 mg/L all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Chlorine, total residualINST MAX <= .011 mg/L all year
004Peracetic AcidINST MAX <= 1 mg/L all year
004Coliform, fecal general30DA GEO <= 1000 #/100mL all year
004Coliform, fecal general7 DA GEO <= 2000 #/100mL 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