MACKAY, CITY OF

NPDES permit ID0023027 · Minor POTW · administratively continued, expires 2023-05-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2023-05-31 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

2values over a limit
0required values missing, on 0 form(s)
0of 29 forms filed late

Last period with anything received: 2026-08-31. Most often over: Solids, suspended percent removal (1), Solids, total suspended (1).

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among ID permits in EPA's filings — check your permit).

Limits in force (43)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeWKLY AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. centigradeINST MAX report only all year
001Oxygen, dissolved [DO]INST MIN report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 65 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 68 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 98 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG <= 45 mg/L all year
001Solids, total suspendedWKLY AVG <= 65 mg/L all year
001Solids, total suspendedMO AVG <= 65 lb/d all year
001Solids, total suspendedWKLY AVG <= 98 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 25 mg/L all year
001Nitrogen, ammonia total [as N]ANNL MAX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 15 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 38 lb/d all year
001Nitrogen, Kjeldahl, total [as N]ANNL MAX report only all year
001Nitrite + Nitrate total [as N]ANNL MAX report only all year
001Phosphorus, total [as P]ANNL MAX report only all year
001Oil and greaseANNL MAX report only all year
001E. coli, MTEC-MFMO GEO <= 126 #/100mL all year
001E. coli, MTEC-MFINST MAX <= 406 #/100mL all year
001Floating solids, waste or visible foam-visualMO MAX <= 0 N=0;Y=1 all year
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 residualMO AVG <= 420 ug/L all year
001Chlorine, total residualDAILY MX <= 470 ug/L all year
001Chlorine, total residualANNL MAX report only all year
001Chlorine, total residualMO AVG <= .63 lb/d all year
001Chlorine, total residualDAILY MX <= .71 lb/d all year
001Solids, total dissolvedANNL MAX report only all year
001BOD, 5-day, percent removalMO AV MN >= 65 % all year
001Solids, suspended percent removalMO AV MN >= 65 % all year
RECTemperature, water deg. centigradeINST MAX report only all year
RECStream flow, instantaneousINST MIN report only all year
RECpHINST MIN report only all year
RECpHINST MAX report only all year
RECNitrogen, ammonia total [as N]INST MAX report only 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