LOWER MERION TWP MONTGOMERY CNTY

NPDES permit PA0244171 · Minor NON-POTW · effective, expires 2029-09-30 · 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 10 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among PA permits in EPA's filings — check your permit).

Limits in force (13)

OutfallParameterStatisticLimitMonths
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Alkalinity, total [as CaCO3]MO AVG report only all year
001Alkalinity, total [as CaCO3]INST MAX report only all year
001Acidity, total [as CaCO3]MO AVG report only all year
001Acidity, total [as CaCO3]INST MAX report only all year
001Solids, total suspendedMO AVG <= 35 mg/L all year
001Solids, total suspendedINST MAX <= 90 mg/L all year
001Iron, total [as Fe]MO AVG <= 1.5 mg/L all year
001Iron, total [as Fe]INST MAX <= 3.7 mg/L all year
001Manganese, total [as Mn]MO AVG <= 2 mg/L all year
001Manganese, total [as Mn]INST MAX <= 5 mg/L all year
001Flow, in conduit or thru treatment plantMO AVG 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