Koppers Inc

NPDES permit VA0001333 · Minor NON-POTW · effective, expires 2030-10-31 · 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 2 forms filed late

Last period with anything received: 2026-04-30.

Reporting

Reports are due about 10 days after each monitoring period ends (the most common figure among VA permits in EPA's filings — check your permit).

Limits in force (16)

OutfallParameterStatisticLimitMonths
001Oxygen demand, chem. [low level] [COD]MAXIMUM report only all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 9.5 SU all year
001Solids, total suspendedMAXIMUM report only all year
001Oil & GreaseMAXIMUM report only all year
001Nitrogen, Kjeldahl, total [as N]MAXIMUM report only all year
001ChryseneMAXIMUM report only all year
001Precipitation volumeMAXIMUM report only all year
001TU LC50 Static 48Hr Acute Pimephales promelasMAXIMUM report only all year
002Oxygen demand, chem. [low level] [COD]MAXIMUM report only all year
002pHINST MIN >= 6.5 SU all year
002pHINST MAX <= 9.5 SU all year
002Solids, total suspendedMAXIMUM report only all year
002Oil & GreaseMAXIMUM report only all year
002Nitrogen, Kjeldahl, total [as N]MAXIMUM report only all year
002Precipitation volumeMAXIMUM 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