Watertown, City of

NPDES permit SD0023370 · Major POTW · administratively continued, expires 2009-06-30 · 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.

This permit expired on 2009-06-30 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

1values over a limit
0required values missing, on 0 form(s)
0of 15 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among SD permits in EPA's filings — check your permit).

Limits in force (45)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. centigrade30DA AVG report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002Flow rate30DA AVG report only all year
002Flow rateDAILY MX report only all year
002Conductivity30DA AVG report only all year
002ConductivityDAILY MX report only all year
002Oxygen, dissolved [DO]DAILY MN >= 7 mg/L all year
002BOD, 5-day, 20 deg. C30DA AVG <= 20 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
002BOD, 5-day, 20 deg. C30DA AVG <= 15 mg/L Jan, Feb, Mar, Nov, Dec
002BOD, 5-day, 20 deg. CMX 7D AV <= 20 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
002BOD, 5-day, 20 deg. CMX 7D AV <= 15 mg/L Jan, Feb, Mar, Nov, Dec
002BOD, 5-day, 20 deg. CDAILY MX <= 35 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
002BOD, 5-day, 20 deg. CDAILY MX <= 26 mg/L Jan, Feb, Mar, Nov, Dec
002BOD, 5-day, 20 deg. C30DA AVG report only all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 9 SU all year
002Alkalinity, total [as CaCO3]30DA AVG report only all year
002Alkalinity, total [as CaCO3]DAILY MX report only all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspendedMX 7D AV <= 45 mg/L all year
002Solids, total suspended30DA AVG report only all year
002Oil & GreaseDAILY MX <= 10 mg/L all year
002Nitrogen, ammonia total [as N]30DA AVG <= 2 mg/L Apr
002Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L May, Jun, Jul, Aug, Sep
002Nitrogen, ammonia total [as N]30DA AVG <= 1.4 mg/L Oct
002Nitrogen, ammonia total [as N]30DA AVG <= 2 mg/L Jan, Feb, Mar, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 3.3 mg/L Apr
002Nitrogen, ammonia total [as N]DAILY MX <= 1.4 mg/L May, Jun, Jul, Aug, Sep
002Nitrogen, ammonia total [as N]DAILY MX <= 2.4 mg/L Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 5.5 mg/L Jan, Feb, Mar, Nov, Dec
002Nitrogen, nitrate total [as N]30DA AVG report only all year
002Nitrogen, nitrate total [as N]DAILY MX report only all year
002Floating solids, waste or visible foam-visualDAILY MX <= 0 N=0;Y=1 all year
002Coliform, fecal general30DA GEO <= 1000 #/100mL May, Jun, Jul, Aug, Sep
002Coliform, fecal generalDAILY MX <= 2000 #/100mL May, Jun, Jul, Aug, Sep
002Coliform, total general30DA GEO <= 5000 #/100mL all year
002Coliform, total generalDAILY MX <= 20000 #/100mL all year
002CBOD5+NH3-N30DA AVG report only all year
002CBOD5+NH3-NDAILY MX report only all year
002BOD, 5-day, percent removalMO AV MN >= 85 % all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
002Hydrocarbons, petroleumDAILY MX <= 1 mg/L all year
002Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
002Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
002Pass/Fail Static Renewal 7Day Chronic Pimephales promelasDAILY MX <= 0 pass=0;fail=1 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