NASSAU COUNTY

NPDES permit NY0026450 · Major POTW · administratively continued, expires 2026-01-31 · 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 2026-01-31 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 15 forms filed late

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

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 (127)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 18000 lb/d all year
001Solids, total suspended7 DA AVG <= 26000 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, settleableDAILY MX <= .3 mL/L all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]ROLL AVG report only all year
001Nitrogen, total [as N]ROLL AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]ROLL AVG <= 11584 lb/d all year
001Nitrogen, total [as N]ROLL AVG <= 8199 lb/d all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]ROLL AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]ROLL AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 11 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG report only Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, nitrite total [as N]MO AVG report only all year
001Nitrogen, nitrite total [as N]ROLL AVG report only all year
001Nitrogen, nitrite total [as N]MO AVG report only all year
001Nitrogen, nitrite total [as N]ROLL AVG report only all year
001Nitrogen, nitrite total [as N]MO AVG report only all year
001Nitrogen, nitrite total [as N]ROLL AVG report only all year
001Nitrogen, nitrite total [as N]MO AVG report only all year
001Nitrogen, nitrite total [as N]ROLL AVG report only all year
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]ROLL AVG report only all year
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]ROLL AVG report only all year
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]ROLL AVG report only all year
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]ROLL AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]ROLL AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]ROLL AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]ROLL AVG report only all year
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrogen, Kjeldahl, total [as N]ROLL AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Cadmium, total [as Cd]DAILY MX report only (alert) all year
001Cadmium, total [as Cd]DAILY MX report only (alert) all year
001Cadmium, total [as Cd]DAILY MX <= 1.5 lb/d (alert) all year
001Cadmium, total [as Cd]DAILY MX <= 1.5 lb/d (alert) all year
001Chromium, total [as Cr]DAILY MX report only (alert) all year
001Chromium, total [as Cr]DAILY MX <= 5.2 lb/d (alert) all year
001Copper, total [as Cu]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX <= 24 lb/d all year
001Lead, total [as Pb]DAILY MX report only (alert) all year
001Lead, total [as Pb]DAILY MX <= 4.2 lb/d (alert) all year
001Nickel, total [as Ni]DAILY MX report only (alert) all year
001Nickel, total [as Ni]DAILY MX <= 9.3 lb/d (alert) all year
001Silver, total [as Ag]DAILY MX report only (alert) all year
001Silver, total [as Ag]DAILY MX <= .9 lb/d (alert) all year
001Zinc, total [as Zn]DAILY MX report only (alert) all year
001Zinc, total [as Zn]DAILY MX <= 87 lb/d (alert) all year
001Phenolics, total recoverableDAILY MX report only (alert) all year
001Phenolics, total recoverableDAILY MX report only (alert) all year
001Phenolics, total recoverableDAILY MX <= 91 lb/d (alert) all year
001Phenolics, total recoverableDAILY MX <= 91 lb/d (alert) all year
001TolueneDAILY MX report only (alert) all year
001TolueneDAILY MX <= 1.1 lb/d (alert) all year
001BenzeneDAILY MX report only (alert) all year
001BenzeneDAILY MX <= .6 lb/d (alert) all year
001Benzo[k]fluorantheneDAILY MX report only (alert) all year
001Benzo[k]fluorantheneDAILY MX <= .6 lb/d (alert) all year
001Diethyl phthalateDAILY MX report only (alert) all year
001Diethyl phthalateDAILY MX <= 2.4 lb/d (alert) all year
001.alpha.-EndosulfanDAILY MX report only all year
001Methyl chloride [Chloromethane]DAILY MX report only all year
001Methylene chlorideDAILY MX report only (alert) all year
001Methylene chlorideDAILY MX <= 5.9 lb/d (alert) all year
001TetrachloroethyleneDAILY MX report only (alert) all year
001TetrachloroethyleneDAILY MX <= 3.8 lb/d (alert) all year
0011,1-DichloroethyleneDAILY MX report only (alert) all year
0011,1-DichloroethyleneDAILY MX <= .8 lb/d (alert) all year
0011,1,1-TrichloroethaneDAILY MX report only (alert) all year
0011,1,1-TrichloroethaneDAILY MX <= 1.4 lb/d (alert) all year
001Benzo[a]anthraceneDAILY MX report only (alert) all year
001Benzo[a]anthraceneDAILY MX <= .6 lb/d (alert) all year
001PentachlorophenolDAILY MX report only (alert) all year
001PentachlorophenolDAILY MX <= 1 lb/d (alert) all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX report only (alert) all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= 11 lb/d (alert) all year
001Di-n-butyl phthalateDAILY MX report only (alert) all year
001Di-n-butyl phthalateDAILY MX <= 11 lb/d (alert) all year
001TrichloroethyleneDAILY MX report only (alert) all year
001TrichloroethyleneDAILY MX <= 1.7 lb/d (alert) all year
001Flow, in conduit or thru treatment plantMO AVG <= 70 MGD all year
001Chlorine, total residualDAILY MX <= .5 mg/L all year
001Enterococci30DA GM report only all year
001Phosphorous, in total orthophosphateDAILY MX report only all year
001Phosphorous, in total orthophosphateDAILY MX report only all year
001Mercury, total [as Hg]ROLL AVG <= 16 ng/L all year
001Mercury, total [as Hg]DAILY MX <= 50 ng/L all year
001Mercury, total [as Hg]DAILY MX <= 50 ng/L all year
001Coliform, fecal general30DA GEO <= 200 #/100L all year
001Coliform, fecal general7 DA GEO <= 400 #/100L all year
001Coliform, total generalMO MED <= 700 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 15000 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 23000 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Carbonaceous oxygen demand, % removalMO AV MN >= 85 % all year
001Tetrachloroethane, totalDAILY MX report only (alert) all year
001Tetrachloroethane, totalDAILY MX <= 2.2 lb/d (alert) all year
00148Hr Acute Mysidopsis BahiaDAILY MX <= 2.4 tox acute all year
001TU 48Hr Acute Cyprinodon variegatusDAILY MX <= 2.4 tox acute all year
001TU Static Renewal Chronic Cyprinodeon variegatusDAILY MX <= 10 tox chronic all year
001TU Static Renewal 7-Day Chronic Americamysis bahia (formerly Mysidopsis bahia)DAILY MX <= 10 tox chronic 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