ROCKLAND CO SD #1

NPDES permit NY0270598 · Major POTW · effective, expires 2031-03-31 · 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.

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

0values over a limit
40required values missing, on 1 form(s)
4of 35 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 (192)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MN >= 7 mg/L all year
001Oxygen, dissolved [DO]DAILY MN >= 7 mg/L all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Solids, total suspendedDAILY MX <= 23 mg/L all year
001Solids, total suspended7 DA AVG <= 23 mg/L all year
001Solids, total suspendedMO AVG <= 630 lb/d all year
001Solids, total suspendedMO AVG <= 190 lb/d all year
001Solids, total suspendedDAILY MX <= 960 lb/d all year
001Solids, total suspended7 DA AVG <= 290 lb/d all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended7 DA AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended7 DA AVG report only all year
001Solids, settleableDAILY MX <= .1 mL/L all year
001Solids, settleableDAILY MX <= .1 mL/L all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 2.3 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 3.1 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 6.3 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Nitrogen, nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]ROLL AVG <= .2 mg/L all year
001Phosphorus, total [as P]ROLL AVG <= .2 mg/L all year
001Phosphorus, total [as P]ROLL AVG report only all year
001Phosphorus, total [as P]ROLL AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Chlorine, total residualDAILY MX <= .03 mg/L all year
001Chlorine, total residualDAILY MX <= .1 mg/L all year
001Perfluorooctanoic acid (PFOA)DAILY MX <= 10 ng/L (alert) all year
001Perfluorobutanoic acid (PFBA)DAILY MX report only all year
001Perfluorooctanesulfonamide (PFOSA)DAILY MX report only all year
001Perfluoropentanoic acid (PFPeA)DAILY MX report only all year
001Perfluorohexanoic acid (PFHxA)DAILY MX report only all year
001Perfluoroheptanoic acid (PFHpA)DAILY MX report only all year
001Perfluorononanoic acid (PFNA)DAILY MX report only all year
001Perfluorodecanoic acid (PFDA)DAILY MX report only all year
001Perfluoroundecanoic acid (PFUnA)DAILY MX report only all year
001Perfluorododecanoic acid (PFDoA)DAILY MX report only all year
001Perfluorotridecanoic acid (PFTrDA)DAILY MX report only all year
001Perfluorotetradecanoic acid (PFTeDA)DAILY MX report only all year
001N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)DAILY MX report only all year
001N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)DAILY MX report only all year
001N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)DAILY MX report only all year
001N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)DAILY MX report only all year
001Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
001Perfluorodecanesulfonic acid (PFDS)DAILY MX report only all year
001Perfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
001Perfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
001Perfluorooctanesulfonic acid (PFOS)DAILY MX <= 10 ng/L (alert) all year
0011H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)DAILY MX report only all year
0011H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
0011H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)DAILY MX report only all year
001Perfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
001Perfluorononanesulfonic acid (PFNS)DAILY MX report only all year
001Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
001Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)DAILY MX report only all year
001Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)DAILY MX report only all year
001Perfluorododecanesulfonic acid (PFDoS)DAILY MX report only all year
0014,8-Dioxa-3H-perfluorononanoic acid (ADONA)DAILY MX report only all year
001N-methyl perfluorooctanesulfonamide (NMeFOSA)DAILY MX report only all year
001N-ethyl perfluorooctanesulfonamide (NEtFOSA)DAILY MX report only all year
001Mercury, total [as Hg]MO AVG <= 50 ng/L all year
001Mercury, total [as Hg]DAILY MX <= 50 ng/L all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Coliform, fecal general30DA GEO <= 200 #/100mL all year
001Coliform, fecal general30DA GEO <= 200 #/100mL all year
001Coliform, fecal general7 DA GEO <= 400 #/100mL all year
001Coliform, fecal general7 DA GEO <= 400 #/100mL all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 7 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 13 mg/L all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 290 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 160 lb/d all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Carbonaceous oxygen demand, % removalMO AV MN >= 85 % all year
0013-Perfluoropropyl propanoic acid (3:3 FTCA)DAILY MX report only all year
001Perfluoro-3-methoxypropanoic acid (PFMPA)DAILY MX report only all year
0019-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)DAILY MX report only all year
00111-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)DAILY MX report only all year
0013-Perfluoroheptyl propanoic acid (7:3 FTCA)DAILY MX report only all year
001Perfluoro-4-methoxybutanoic acid (PFMBA)DAILY MX report only all year
0012H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)DAILY MX report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Oxygen, dissolved [DO]DAILY MN >= 7 mg/L all year
002Oxygen, dissolved [DO]DAILY MN >= 7 mg/L all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 8.5 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 15 mg/L all year
002Solids, total suspendedDAILY MX <= 10 mg/L all year
002Solids, total suspended7 DA AVG <= 23 mg/L all year
002Solids, total suspendedMO AVG <= 190 lb/d all year
002Solids, total suspendedDAILY MX <= 420 lb/d all year
002Solids, total suspended7 DA AVG <= 290 lb/d all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspended7 DA AVG report only all year
002Solids, total suspendedMO AVG report only all year
002Solids, total suspendedDAILY MX report only all year
002Solids, total suspended7 DA AVG report only all year
002Solids, settleableDAILY MX <= .1 mL/L all year
002Solids, settleableDAILY MX <= .1 mL/L all year
002Nitrogen, ammonia total [as N]MO AVG <= .9 mg/L Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 1.9 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
002Nitrogen, ammonia total [as N]MO AVG <= 2.3 mg/L Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 3.1 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
002Nitrogen, nitrate total [as N]MO AVG report only all year
002Nitrogen, nitrate total [as N]MO AVG report only all year
002Phosphorus, total [as P]ROLL AVG <= .2 mg/L all year
002Phosphorus, total [as P]ROLL AVG <= .2 mg/L all year
002Phosphorus, total [as P]ROLL AVG report only all year
002Phosphorus, total [as P]ROLL AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Chlorine, total residualDAILY MX <= .03 mg/L all year
002Chlorine, total residualDAILY MX <= .1 mg/L all year
002Perfluorooctanoic acid (PFOA)DAILY MX <= 10 ng/L (alert) all year
002Perfluorobutanoic acid (PFBA)DAILY MX report only all year
002Perfluorooctanesulfonamide (PFOSA)DAILY MX report only all year
002Perfluoropentanoic acid (PFPeA)DAILY MX report only all year
002Perfluorohexanoic acid (PFHxA)DAILY MX report only all year
002Perfluoroheptanoic acid (PFHpA)DAILY MX report only all year
002Perfluorononanoic acid (PFNA)DAILY MX report only all year
002Perfluorodecanoic acid (PFDA)DAILY MX report only all year
002Perfluoroundecanoic acid (PFUnA)DAILY MX report only all year
002Perfluorododecanoic acid (PFDoA)DAILY MX report only all year
002Perfluorotridecanoic acid (PFTrDA)DAILY MX report only all year
002Perfluorotetradecanoic acid (PFTeDA)DAILY MX report only all year
002N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE)DAILY MX report only all year
002N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE)DAILY MX report only all year
002N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)DAILY MX report only all year
002N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)DAILY MX report only all year
002Perfluorobutanesulfonic acid (PFBS)DAILY MX report only all year
002Perfluorodecanesulfonic acid (PFDS)DAILY MX report only all year
002Perfluoroheptanesulfonic acid (PFHpS)DAILY MX report only all year
002Perfluorohexanesulfonic acid (PFHxS)DAILY MX report only all year
002Perfluorooctanesulfonic acid (PFOS)DAILY MX <= 10 ng/L (alert) all year
0021H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS)DAILY MX report only all year
0021H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS)DAILY MX report only all year
0021H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS)DAILY MX report only all year
002Perfluoropentanesulfonic acid (PFPeS)DAILY MX report only all year
002Perfluorononanesulfonic acid (PFNS)DAILY MX report only all year
002Hexafluoropropylene oxide dimer acid (HFPO-DA)DAILY MX report only all year
002Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)DAILY MX report only all year
002Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)DAILY MX report only all year
002Perfluorododecanesulfonic acid (PFDoS)DAILY MX report only all year
0024,8-Dioxa-3H-perfluorononanoic acid (ADONA)DAILY MX report only all year
002N-methyl perfluorooctanesulfonamide (NMeFOSA)DAILY MX report only all year
002N-ethyl perfluorooctanesulfonamide (NEtFOSA)DAILY MX report only all year
002Mercury, total [as Hg]MO AVG <= 50 ng/L all year
002Mercury, total [as Hg]DAILY MX <= 50 ng/L all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
002Coliform, fecal general30DA GEO <= 200 #/100mL all year
002Coliform, fecal general30DA GEO <= 200 #/100mL all year
002Coliform, fecal general7 DA GEO <= 400 #/100mL all year
002Coliform, fecal general7 DA GEO <= 400 #/100mL all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 10 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 19 mg/L all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 420 lb/d all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 240 lb/d all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
002BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
002Carbonaceous oxygen demand, % removalMO AV MN >= 85 % all year
0023-Perfluoropropyl propanoic acid (3:3 FTCA)DAILY MX report only all year
002Perfluoro-3-methoxypropanoic acid (PFMPA)DAILY MX report only all year
0029-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)DAILY MX report only all year
00211-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)DAILY MX report only all year
0023-Perfluoroheptyl propanoic acid (7:3 FTCA)DAILY MX report only all year
002Perfluoro-4-methoxybutanoic acid (PFMBA)DAILY MX report only all year
0022H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA)DAILY MX report only all year
SUMFlow, in conduit or thru treatment plantMO AVG <= 5 MGD all year
SUMFlow, in conduit or thru treatment plantMO AVG <= 1.5 MGD 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