ROCKLAND COUNTY SD#1 STP

NPDES permit NY0031895 · Major POTW · effective, expires 2028-06-30 · 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.

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

15values over a limit
6required values missing, on 3 form(s)
1of 27 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, carbonaceous [5 day, 20 C] (6), Carbonaceous oxygen demand, % removal (5), Solids, total suspended (2).

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 (77)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY 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 <= 7200 lb/d all year
001Solids, total suspended7 DA AVG <= 11000 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, ammonia total [as N]DAILY AV <= 5.9 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 12 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 <= 1400 lb/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 2900 lb/d 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, ammonia total [as N]MO AVG report only all year
001Nitrogen, nitrite total [as N]DAILY MX report only all year
001Nitrogen, nitrite total [as N]DAILY MX report only all year
001Nitrogen, nitrite 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
001Nitrogen, nitrate total [as N]DAILY MX report only all year
001Nitrogen, nitrate total [as N]DAILY MX report only all year
001Nitrogen, nitrate total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX report only (alert) all year
001Copper, total [as Cu]DAILY MX <= 8.1 lb/d (alert) all year
001Lead, total [as Pb]DAILY MX report only (alert) all year
001Lead, total [as Pb]DAILY MX <= .5 lb/d (alert) all year
001Zinc, total [as Zn]DAILY MX report only (alert) all year
001Zinc, total [as Zn]DAILY MX <= 23 lb/d (alert) all year
001Total phenolsDAILY MX report only (alert) all year
001Total phenolsDAILY MX <= 4 lb/d (alert) all year
001Flow, in conduit or thru treatment plantMO AVG <= 29 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG report only May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= .12 mg/L May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= .5 mg/L May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualMO AVG report only May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= 29 lb/d May, Jun, Jul, Aug, Sep, Oct
001Mercury, total [as Hg]ROLL AVG <= 20 ng/L Mar, Jun, Sep, Dec
001Mercury, total [as Hg]DAILY MX <= 50 ng/L Mar, Jun, Sep, Dec
001Coliform, fecal general30DA GEO <= 200 #/100mL May, Jun, Jul, Aug, Sep, Oct
001Coliform, fecal general7 DA GEO <= 400 #/100mL May, Jun, Jul, Aug, Sep, Oct
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 <= 6000 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 9600 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
001TU Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MAXIMUM <= 2.2 tox acute all year
001TU 48Hr Acute Cyprinodon variegatusMAXIMUM <= 2.2 tox acute all year
001TU Static Renewal Chronic Cyprinodeon variegatusMAXIMUM <= 16 tox chronic (alert) all year
001TU Static Renewal 7-Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MAXIMUM <= 16 tox chronic (alert) all year
002Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
003Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
004Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
005Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
006Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
007Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
008Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
009Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
010Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
011Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) all year
012Oxygen demand, chem. [high level] [COD]DAILY MX <= 120 mg/L (alert) 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