COSTCO WHOLESALE CORP

NPDES permit NY0279935 · Minor NON-POTW · effective, expires 2032-02-28 · 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

8values over a limit
28required values missing, on 2 form(s)
3of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Xylene [mix of m+o+p] (3), Toluene (2), Ethylbenzene (1).

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 (14)

OutfallParameterStatisticLimitMonths
001Flow rateDAILY MX <= 750000 gal/d all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001FluorineDAILY MX <= 10 ug/L all year
001TolueneDAILY MX <= 5 ug/L all year
001BenzeneDAILY MX <= 5 ug/L all year
001ChryseneDAILY MX <= 1 ug/L all year
001EthylbenzeneDAILY MX <= 5 ug/L all year
001PyreneDAILY MX <= 1 ug/L all year
001NaphthaleneDAILY MX <= 10 ug/L all year
001TrimethylbenzeneDAILY MX <= 19 ug/L all year
001Xylene [mix of m+o+p]DAILY MX <= 15 ug/L all year
001n-PentaneDAILY MX 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