WYMAN-GORDON COMPANY

NPDES permit MA0004341 · Major NON-POTW · administratively continued, expires 2012-11-30 · 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.

This permit expired on 2012-11-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
1required values missing, on 1 form(s)
40of 42 forms filed late

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

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (69)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.3 SU all year
001Solids, total suspendedDAILY MX <= 62 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0073 mg/L all year
001Aluminum, total [as Al]MO AVG report only all year
001Aluminum, total [as Al]DAILY MX report only all year
001TrichloroethyleneMO AVG report only all year
001TrichloroethyleneDAILY MX report only all year
001TetrachloroethyleneMO AVG report only all year
001TetrachloroethyleneDAILY MX report only all year
001LC50 Static 48Hr Acute Ceriodaphnia dubiaDAILY MN >= 100 % all year
007pHMINIMUM >= 6.5 SU all year
007pHMAXIMUM <= 8.3 SU all year
007Solids, total suspendedMO AVG report only all year
007Solids, total suspendedDAILY MX report only all year
007Oil & GreaseDAILY MX <= 15 mg/L all year
007Copper, total [as Cu]DAILY MX report only all year
007Iron, total [as Fe]DAILY MX report only all year
007Aluminum, total [as Al]DAILY MX report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
008pHMINIMUM >= 6.5 SU all year
008pHMAXIMUM <= 8.3 SU all year
008Solids, total suspendedMO AVG report only all year
008Solids, total suspendedDAILY MX report only all year
008Oil & GreaseDAILY MX <= 15 mg/L all year
008Copper, total [as Cu]DAILY MX report only all year
008Iron, total [as Fe]DAILY MX <= 1.01 mg/L all year
008Iron, total [as Fe]DAILY MX report only all year
008Zinc, total [as Zn]DAILY MX <= .067 mg/L all year
008Zinc, total [as Zn]DAILY MX report only all year
008Aluminum, total [as Al]DAILY MX <= .76 mg/L all year
008Aluminum, total [as Al]DAILY MX report only all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
009pHMINIMUM >= 6.5 SU all year
009pHDAILY MX <= 8.3 SU all year
009Solids, total suspendedMO AVG report only all year
009Solids, total suspendedDAILY MX report only all year
009Oil & GreaseDAILY MX <= 15 mg/L all year
009Copper, total [as Cu]DAILY MX <= .0073 mg/L all year
009Copper, total [as Cu]DAILY MX report only all year
009Iron, total [as Fe]DAILY MX <= 1 mg/L all year
009Iron, total [as Fe]DAILY MX report only all year
009Aluminum, total [as Al]DAILY MX <= .75 mg/L all year
009Aluminum, total [as Al]DAILY MX report only all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
010pHMINIMUM >= 6.5 SU all year
010pHMAXIMUM <= 8.3 SU all year
010Solids, total suspendedMO AVG report only all year
010Solids, total suspendedDAILY MX report only all year
010Oil & GreaseDAILY MX <= 15 mg/L all year
010Copper, total [as Cu]MO AVG report only all year
010Copper, total [as Cu]DAILY MX report only all year
010Iron, total [as Fe]MO AVG report only all year
010Iron, total [as Fe]DAILY MX report only all year
010Lead, total [as Pb]MO AVG report only all year
010Lead, total [as Pb]DAILY MX report only all year
010Nickel, total [as Ni]MO AVG report only all year
010Nickel, total [as Ni]DAILY MX report only all year
010Aluminum, total [as Al]MO AVG report only all year
010Aluminum, total [as Al]DAILY MX report only all year
010TrichloroethyleneMO AVG report only all year
010TrichloroethyleneDAILY MX report only all year
010TetrachloroethyleneMO AVG report only all year
010TetrachloroethyleneDAILY MX report only all year
010LC50 Static 48Hr Acute Ceriodaphnia dubiaDAILY MN >= 100 % 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