NPD Management LLC

NPDES permit WA0991044 · Minor NON-POTW · effective, expires 2030-12-31 · 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

0values over a limit
0required values missing, on 0 form(s)
2of 14 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (8)

OutfallParameterStatisticLimitMonths
002TurbidityDAILY MX <= 50 NTU all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 8.5 SU all year
002Arsenic, dissolved [as As]DAILY MX report only (alert) all year
002Arsenic, total [as As]DAILY MX report only (alert) all year
002Iron, total [as Fe]DAILY MX report only (alert) all year
MP2Iron, total [as Fe]DAILY MX report only (alert) all year
MP2FlowDAILY MX report only (alert) 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