GCP LABORATORIES INC

NPDES permit MS0002020 · Minor NON-POTW · effective, expires 2028-02-29 · 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 13 forms filed late

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

Reporting

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

Limits in force (28)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 90 deg F all year
001Sulfate [as S]MO AVG report only all year
001Sulfate [as S]DAILY MX report only all year
001Sulfate [as S]MO AVG report only all year
001Sulfate [as S]DAILY MX report only all year
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 4.2 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 6.3 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 25 mg/L all year
001Solids, total suspendedDAILY MX <= 50 mg/L all year
001Solids, total suspendedMO AVG <= 10.4 lb/d all year
001Solids, total suspendedDAILY MX <= 20.9 lb/d all year
001Copper, total recoverableMO AVG <= .022 mg/L all year
001Copper, total recoverableDAILY MX <= .034 mg/L all year
001Copper, total recoverableMO AVG <= .01 lb/d all year
001Copper, total recoverableDAILY MX <= .014 lb/d 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
001Chemical Oxygen Demand [COD]MO AVG <= 86 mg/L all year
001Chemical Oxygen Demand [COD]DAILY MX <= 228 mg/L all year
001Chemical Oxygen Demand [COD]MO AVG <= 36 lb/d all year
001Chemical Oxygen Demand [COD]DAILY MX <= 95 lb/d all year
001% Effect Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MINIMUM >= 14.3 % all year
001%Effect Static Renewal 7Day Chronic MenidiaMINIMUM >= 14.3 % 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