GRANITE SHORE POWER MERRIMACK LLC

NPDES permit NH0001465 · Major NON-POTW · administratively continued, expires 2025-08-31 · 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.

This permit expired on 2025-08-31 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
0required values missing, on 0 form(s)
0of 77 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among NH permits in EPA's filings — check your permit).

Limits in force (88)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Oxidants, total residualINST MAX <= .2 mg/L all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX <= 69.1 MGD all year
002Temperature, water deg. centigradeMO AVG report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Temperature, water deg. fahrenheitMO AVG report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Oxidants, total residualDAILY MX <= .2 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX <= 187.2 MGD all year
003Temperature, water deg. centigradeMO AVG report only all year
003Temperature, water deg. centigradeDAILY MX report only all year
003Temperature, water deg. centigradeDAILY MX report only all year
003Temperature, water deg. fahrenheitMO AVG report only all year
003Temperature, water deg. fahrenheitDAILY MX report only all year
003Temperature, water deg. fahrenheitDAILY MX report only all year
003Oxygen, dissolved percent saturationMINIMUM >= 75 % all year
003pHMINIMUM >= 6.5 SU all year
003pHMINIMUM report only all year
003pHMAXIMUM <= 8 SU all year
003pHMAXIMUM report only all year
003pHDAILY MX report only all year
003Solids, totalDAILY MX report only all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedMO AVG report only all year
003Solids, total suspendedDAILY MX <= 100 mg/L all year
003Solids, total suspendedDAILY MX report only all year
003Oil & GreaseMO AVG <= 15 mg/L all year
003Oil & GreaseMO AVG report only all year
003Oil & GreaseDAILY MX <= 20 mg/L all year
003Oil & GreaseDAILY MX report only all year
003Hardness, total [as CaCO3]DAILY MX report only all year
003Hardness, total [as CaCO3]DAILY MX report only all year
003Iron, total recoverableMO AVG <= 1 mg/L all year
003Iron, total recoverableDAILY MX <= 1 mg/L all year
003Cadmium, total [as Cd]DAILY MX report only all year
003Cadmium, total [as Cd]DAILY MX report only all year
003Copper, total [as Cu]DAILY MX report only all year
003Copper, total [as Cu]DAILY MX report only all year
003Lead, total [as Pb]DAILY MX report only all year
003Lead, total [as Pb]DAILY MX report only all year
003Nickel, total [as Ni]DAILY MX report only all year
003Nickel, total [as Ni]DAILY MX report only all year
003Zinc, total [as Zn]DAILY MX report only all year
003Zinc, total [as Zn]DAILY MX report only Jan, Feb, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
003Aluminum, total [as Al]DAILY MX report only all year
003Aluminum, total [as Al]DAILY MX report only all year
003Copper, total recoverableMO AVG <= 1 mg/L all year
003Copper, total recoverableDAILY MX report only all year
003Copper, total recoverableDAILY MX <= 1 mg/L all year
003Oxidants, total residualDAILY MX <= .03 mg/L all year
003Flow, in conduit or thru treatment plantMO AVG <= 265.3 MGD all year
003Flow, in conduit or thru treatment plantMO AVG <= 5.3 MGD all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX <= 275.4 MGD all year
003Flow, in conduit or thru treatment plantDAILY MX <= 13 MGD all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Ammonia [as N] + unionized ammoniaDAILY MX report only all year
003Ammonia [as N] + unionized ammoniaDAILY MX report only all year
003Solids, total dissolvedDAILY MX report only all year
003LC50 Static 48Hr Acute Ceriodaphnia dubiaMO AV MN report only all year
003LC50 Static 48Hr Acute Pimephales promelasMO AV MN report only all year
003NOAEL Static 48Hr Acute Ceriodaphnia dubiaMO AV MN report only all year
003NOAEL Static Renewal 48Hr Acute Pimephales promelasMO AV MN report only all year
004pHMINIMUM >= 6.5 SU all year
004pHMINIMUM >= 6.5 SU all year
004pHMINIMUM >= 6.5 SU all year
004pHMAXIMUM <= 8 SU all year
004pHMAXIMUM <= 8 SU all year
004pHMAXIMUM <= 8 SU all year
004Oil & GreaseDAILY MX report only all year
004Oil & GreaseDAILY MX report only all year
004Oil & GreaseDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
005pHMINIMUM >= 6.5 SU all year
005pHMINIMUM >= 6.5 SU all year
005pHMAXIMUM <= 8 SU all year
005pHMAXIMUM <= 8 SU all year
005Oil & GreaseDAILY MX report only all year
005Oil & GreaseDAILY MX report only all year
005Flow, in conduit or thru treatment plantANNL TOT report only all year
005Flow, in conduit or thru treatment plantANNL TOT 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