NAVAL SUBMARINE BASE NEW LONDON

NPDES permit CT0003921 · Major FEDERAL · administratively continued, expires 2017-02-28 · 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.

This permit expired on 2017-02-28 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

4values over a limit
1required values missing, on 1 form(s)
1of 128 forms filed late

Last period with anything received: 2026-07-31. Most often over: Flow, maximum during 24 hr period (2), Chlorine, total residual (1), Flow (1).

Reporting

Reports are due about 30 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (198)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitINST MAX <= 90 deg F May, Jun, Jul, Aug, Sep, Oct
001Temperature, water deg. fahrenheitINST MAX <= 80 deg F Jan, Feb, Mar, Apr, Nov, Dec
001Flow rateMO AVG report only all year
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedDAILY MX report only all year
001Oil & GreaseINST MAX <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, nitrite total [as N]DAILY MX report only all year
001Nitrogen, nitrate total [as N]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX <= .02 mg/L all year
001Lead, total [as Pb]DAILY MX <= .01 mg/L all year
001Nickel, total [as Ni]DAILY MX <= .01 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .034 mg/L all year
001Flow, maximum during 24 hr periodDAILY MX <= 15 MGD all year
001Temp. diff. between intake and dischargeINST MAX <= 40 deg F all year
001pH, maximumINST MAX <= 9 SU all year
001pH, minimumINST MIN >= 6 SU all year
001FlowDAILY MX <= 15 MGD all year
001LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MN >= 90 % Mar, Jun, Sep, Dec
001LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
001NOAEL Static Renewal 96Hr Acute Menidia sp.DAILY MN >= 90 % Mar, Jun, Sep, Dec
001NOAEL Static Renewal 96Hr Acute Menidia sp.DAILY MN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
002Temperature, water deg. fahrenheitINST MAX <= 90 deg F May, Jun, Jul, Aug, Sep, Oct
002Temperature, water deg. fahrenheitINST MAX <= 80 deg F Jan, Feb, Mar, Apr, Nov, Dec
002Flow rateMO AVG report only all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 9 SU all year
002Solids, total suspendedDAILY MX report only all year
002Oil & GreaseINST MAX <= 10 mg/L all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, nitrite total [as N]DAILY MX report only all year
002Nitrogen, nitrate total [as N]DAILY MX report only all year
002Copper, total [as Cu]DAILY MX <= .02 mg/L all year
002Lead, total [as Pb]DAILY MX <= .01 mg/L all year
002Nickel, total [as Ni]DAILY MX < .01 mg/L all year
002Zinc, total [as Zn]DAILY MX <= .034 mg/L all year
002Flow, maximum during 24 hr periodDAILY MX <= 15 MGD all year
002Temp. diff. between intake and dischargeINST MAX <= 25 deg F all year
002pH, maximumINST MAX <= 9 SU all year
002pH, minimumINST MIN >= 6 SU all year
002FlowDAILY MX <= 15 MGD all year
002LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MN >= 90 % Mar, Jun, Sep, Dec
002LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
002NOAEL Static Renewal 96Hr Acute Menidia sp.DAILY MN >= 90 % Mar, Jun, Sep, Dec
002NOAEL Static Renewal 96Hr Acute Menidia sp.DAILY MN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
005pHINST MIN >= 6 SU Jan, Feb, Mar, Dec
005pHINST MAX <= 9 SU Jan, Feb, Mar, Dec
005Copper, total [as Cu]INST MAX <= .24 mg/L Jan, Feb, Mar, Dec
005Lead, total [as Pb]INST MAX report only Jan, Feb, Mar, Dec
005Zinc, total [as Zn]INST MAX report only Jan, Feb, Mar, Dec
005Chlorine, total residualINST MAX report only Jan, Feb, Mar, Dec
005FlowDAILY MX <= 201600 gal/d Jan, Feb, Mar, Dec
005LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)INST MIN > 20 % Dec
005LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)INST MIN report only Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
005LC50 Static 96Hr Acute MenidiaINST MIN > 20 % Dec
005LC50 Static 96Hr Acute MenidiaINST MIN report only Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
006Temperature, water deg. fahrenheitINST MAX <= 90 deg F Jul
006Temperature, water deg. fahrenheitINST MAX <= 80 deg F Jan
006pHINST MIN >= 6 SU Jan, Jul
006pHINST MAX <= 9 SU Jan, Jul
006Solids, total suspendedINST MAX report only Jan, Jul
006Nitrogen, ammonia total [as N]INST MAX report only Jan, Jul
006Nitrogen, nitrite total [as N]INST MAX report only Jan, Jul
006Nitrogen, nitrate total [as N]INST MAX report only Jan, Jul
006Copper, total [as Cu]INST MAX report only Jan, Jul
006Iron, total [as Fe]INST MAX report only Jan, Jul
006Lead, total [as Pb]INST MAX report only Jan, Jul
006Nickel, total [as Ni]INST MAX report only Jan, Jul
006Silver, total [as Ag]INST MAX report only Jan, Jul
006Zinc, total [as Zn]INST MAX report only Jan, Jul
006Flow, maximum during 24 hr periodDAILY MX <= 1.44 MGD Jan, Jul
006FlowDAILY MX <= 1.44 MGD Jan, Jul
006Noael Static 48Hr Acute Mysid. BahiaINST MIN >= 90 % Jan, Jul
006NOAEL Static Renewal 96Hr Acute Menidia sp.INST MIN >= 90 % Jan, Jul
009BOD, 5-day, 20 deg. CDAILY MX report only Mar, Jun, Sep, Dec
009pHINST MIN >= 6 SU Mar, Jun, Sep, Dec
009pHINST MAX <= 9 SU Mar, Jun, Sep, Dec
009Solids, total suspendedDAILY MX report only Mar, Jun, Sep, Dec
009Oil & GreaseDAILY MX <= 10 mg/L Mar, Jun, Sep, Dec
009Nitrogen, ammonia total [as N]DAILY MX report only Mar, Jun, Sep, Dec
009Nitrogen, nitrite total [as N]DAILY MX report only Mar, Jun, Sep, Dec
009Nitrogen, nitrate total [as N]DAILY MX report only Mar, Jun, Sep, Dec
009Copper, total [as Cu]DAILY MX report only Mar, Jun, Sep, Dec
009Iron, total [as Fe]DAILY MX report only Mar, Jun, Sep, Dec
009Lead, total [as Pb]DAILY MX report only Mar, Jun, Sep, Dec
009Nickel, total [as Ni]DAILY MX report only Mar, Jun, Sep, Dec
009Silver, total [as Ag]DAILY MX report only Mar, Jun, Sep, Dec
009Zinc, total [as Zn]DAILY MX report only Mar, Jun, Sep, Dec
009Tin, total [as Sn]DAILY MX report only Mar, Jun, Sep, Dec
009Aluminum, total [as Al]DAILY MX report only Mar, Jun, Sep, Dec
009Oxidants, total residualINST MAX report only Mar, Jun, Sep, Dec
009Flow, maximum during 24 hr periodDAILY MX <= 5 MGD Mar, Jun, Sep, Dec
009FlowDAILY MX <= 5 MGD Mar, Jun, Sep, Dec
009LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MINIMUM > 41 % Mar, Jun, Sep, Dec
009LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MINIMUM report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
009LC50 Static 96Hr Acute MenidiaMINIMUM > 41 % Mar, Jun, Sep, Dec
009LC50 Static 96Hr Acute MenidiaMINIMUM report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
011Rainfall durationDAILY MX report only Jan, Jul
011Oxygen demand, chem. [low level] [COD]INST MAX report only Jan, Jul
011pHINST MAX report only Jan, Jul
011Solids, total suspendedINST MAX report only Jan, Jul
011Oil & GreaseINST MAX report only Jan, Jul
011Nitrogen, nitrate total [as N]INST MAX report only Jan, Jul
011Nitrogen, Kjeldahl, total [as N]INST MAX report only Jan, Jul
011Phosphorus, total [as P]INST MAX report only Jan, Jul
011Cadmium, total [as Cd]INST MAX report only Jan, Jul
011Chromium, total [as Cr]INST MAX report only Jan, Jul
011Copper, total [as Cu]INST MAX report only Jan, Jul
011Iron, total [as Fe]INST MAX report only Jan, Jul
011Lead, total [as Pb]INST MAX report only Jan, Jul
011Nickel, total [as Ni]INST MAX report only Jan, Jul
011Silver, total [as Ag]INST MAX report only Jan, Jul
011Zinc, total [as Zn]INST MAX report only Jan, Jul
011Tin, total [as Sn]INST MAX report only Jan, Jul
011Aluminum, total [as Al]INST MAX report only Jan, Jul
011RainfallDAILY MX report only Jan, Jul
011FlowDAILY MX report only Jan, Jul
011LC50 Static 48Hr Acute D. PulexMINIMUM report only Jan, Jul
011LC50 Static 48Hr Acute Pimephales promelasMINIMUM report only Jan, Jul
012pHINST MIN >= 6 SU Jan, Jul
012pHINST MAX <= 9 SU Jan, Jul
012Solids, total suspendedINST MAX report only Jan, Jul
012Oil & GreaseINST MAX <= 10 mg/L Jan, Jul
012Copper, total [as Cu]INST MAX report only Jan, Jul
012Iron, total [as Fe]INST MAX report only Jan, Jul
012Lead, total [as Pb]INST MAX report only Jan, Jul
012Zinc, total [as Zn]INST MAX report only Jan, Jul
012Surfactants [MBAS]INST MAX report only Jan, Jul
012FlowDAILY MX report only Jan, Jul
012CyclohexylamineINST MAX report only Jan, Jul
012LC50 Static 48Hr Acute D. PulexMINIMUM report only Jan, Jul
012LC50 Static 96Hr Acute PimephalesMINIMUM report only Jan, Jul
014pHINST MIN >= 6 SU Jan, Jul
014pHINST MAX <= 9 SU Jan, Jul
014Solids, total suspendedINST MAX report only Jan, Jul
014Oil & GreaseINST MAX <= 10 mg/L Jan, Jul
014Copper, total [as Cu]INST MAX report only Jan, Jul
014Iron, total [as Fe]INST MAX report only Jan, Jul
014Lead, total [as Pb]INST MAX report only Jan, Jul
014Zinc, total [as Zn]INST MAX report only Jan, Jul
014Surfactants [MBAS]INST MAX report only Jan, Jul
014FlowDAILY MX report only Jan, Jul
014CyclohexylamineINST MAX report only Jan, Jul
014LC50 Static 48Hr Acute D. PulexMINIMUM report only Jan, Jul
014LC50 Static 96Hr Acute PimephalesMINIMUM report only Jan, Jul
015pHINST MIN >= 6 SU Jan, Jul
015pHINST MAX <= 9 SU Jan, Jul
015Solids, total suspendedINST MAX report only Jan, Jul
015Oil & GreaseINST MAX <= 10 mg/L Jan, Jul
015Copper, total [as Cu]INST MAX report only Jan, Jul
015Iron, total [as Fe]INST MAX report only Jan, Jul
015Lead, total [as Pb]INST MAX report only Jan, Jul
015Zinc, total [as Zn]INST MAX report only Jan, Jul
015Surfactants [MBAS]INST MAX report only Jan, Jul
015FlowDAILY MX report only Jan, Jul
015CyclohexylamineINST MAX report only Jan, Jul
015LC50 Static 48Hr Acute D. PulexMINIMUM report only Jan, Jul
015LC50 Static 96Hr Acute PimephalesMINIMUM report only Jan, Jul
017Temperature, water deg. fahrenheitINST MAX report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017pHINST MIN >= 6 SU Jan, Feb, Mar, Sep, Oct, Nov, Dec
017pHINST MAX <= 9 SU Jan, Feb, Mar, Sep, Oct, Nov, Dec
017Solids, total suspendedINST MAX report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017Copper, total [as Cu]INST MAX report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017Iron, total [as Fe]INST MAX report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017Lead, total [as Pb]INST MAX report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017Zinc, total [as Zn]INST MAX report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017CyclohexylamineINST MAX report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MINIMUM report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
017LC50 Static 96Hr Acute MenidiaMINIMUM report only Jan, Feb, Mar, Sep, Oct, Nov, Dec
019pHINST MIN >= 6 SU Dec
019pHINST MAX <= 9 SU Dec
019Copper, total [as Cu]INST MAX report only Dec
019Iron, total [as Fe]INST MAX report only Dec
019Lead, total [as Pb]INST MAX report only Dec
019Nickel, total [as Ni]INST MAX report only Dec
019Zinc, total [as Zn]INST MAX report only Dec
019Flow, maximum during 24 hr periodDAILY MX report only Dec
019Chlorine, total residualINST MAX <= .61 mg/L Dec
019FlowDAILY MX report only Dec
019LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MINIMUM report only Dec
019LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MINIMUM report only Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
019LC50 Static 96Hr Acute MenidiaMINIMUM report only Dec
019LC50 Static 96Hr Acute MenidiaMINIMUM report only Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
01HTemperature, water deg. fahrenheitINST MAX report only all year
01HpHINST MAX report only all year
01HSolids, total suspendedDAILY MX report only all year
01HOil & GreaseINST MAX report only all year
01HNitrogen, ammonia total [as N]DAILY MX report only all year
01HNitrogen, nitrite total [as N]DAILY MX report only all year
01HNitrogen, nitrate total [as N]DAILY MX report only all year
01HCopper, total [as Cu]DAILY MX report only all year
01HLead, total [as Pb]DAILY MX report only all year
01HZinc, total [as Zn]DAILY MX report only all year
01HLC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MN report only Mar, Jun, Sep, Dec
01HLC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)DAILY MN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov
01HNOAEL Static Renewal 96Hr Acute Menidia sp.DAILY MN report only Mar, Jun, Sep, Dec
01HNOAEL Static Renewal 96Hr Acute Menidia sp.DAILY MN report only Jan, Feb, Apr, May, Jul, Aug, Oct, Nov

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