City of Maryville

NPDES permit TN0020079 · Major POTW · effective, expires 2027-12-31 · 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

5values over a limit
235required values missing, on 7 form(s)
6of 33 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (3), E. coli (1), BOD, carbonaceous, percent removal (1).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (116)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 3 mg/L all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 21 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 18 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedWKLY AVG <= 29 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedWKLY AVG <= 24 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedDAILY MX <= 45 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedDAILY MX <= 45 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedMO AVG <= 2502 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 2502 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, total suspendedWKLY AVG <= 3336 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedWKLY AVG <= 3336 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Solids, settleableDAILY MX <= 1 mL/L all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, total [as N]ROLL AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX 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
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .92 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Chlorine, total residualDAILY MX <= 1.12 mg/L May, Jun, Jul, Aug, Sep, Oct
001E. coliMO GEOMN <= 126 #/100mL all year
001E. coliDAILY MX <= 487 #/100mL all year
001SSO, Dry WeatherMO TOTAL <= 0 occur/mo all year
001SSO, Wet WeatherMO TOTAL <= 0 occur/mo all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 23 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 15 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 2085 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 1168 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 3128 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 1751 lb/d May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous, percent removalMO AV MN >= 85 % all year
001BOD, carbonaceous, percent removalDAILY MN >= 40 % all year
001Solids, suspended percent removalDAILY MN >= 40 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 37 % Jan, Feb, Mar, Apr, Nov, Dec
001IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 32 % May, Jun, Jul, Aug, Sep, Oct
001IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 32 % May, Jun, Jul, Aug, Sep, Oct
001IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 37 % Jan, Feb, Mar, Apr, Nov, Dec
002Oxygen, dissolved [DO]DAILY MN >= 6 mg/L all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 18 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Solids, total suspendedMO AVG <= 21 mg/L May, Jun, Jul, Aug, Sep, Oct
002Solids, total suspendedWKLY AVG <= 24 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Solids, total suspendedWKLY AVG <= 29 mg/L May, Jun, Jul, Aug, Sep, Oct
002Solids, total suspendedDAILY MX <= 45 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Solids, total suspendedDAILY MX <= 45 mg/L May, Jun, Jul, Aug, Sep, Oct
002Solids, total suspendedMO AVG <= 2502 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002Solids, total suspendedMO AVG <= 2502 lb/d May, Jun, Jul, Aug, Sep, Oct
002Solids, total suspendedWKLY AVG <= 3336 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002Solids, total suspendedWKLY AVG <= 3336 lb/d May, Jun, Jul, Aug, Sep, Oct
002Solids, settleableDAILY MX <= 1 mL/L all year
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, total [as N]ROLL AVG report only all year
002Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]WKLY AVG <= 4.5 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]WKLY AVG <= 7.5 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 6 mg/L May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]MO AVG <= 117 lb/d May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]MO AVG <= 142 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]DAILY MX <= 700 lb/d May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]DAILY MX <= 1418 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002Nitrogen, ammonia total [as N]WKLY AVG <= 525 lb/d May, Jun, Jul, Aug, Sep, Oct
002Nitrogen, ammonia total [as N]WKLY AVG <= 1063 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]DAILY MX 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
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualDAILY MX <= .05 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002Chlorine, total residualDAILY MX <= .06 mg/L May, Jun, Jul, Aug, Sep, Oct
002E. coliMO AVG <= 126 #/100mL all year
002E. coliDAILY MX <= 487 #/100mL all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct
002BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 23 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 15 mg/L May, Jun, Jul, Aug, Sep, Oct
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 30 mg/L Jan, Feb, Mar, Apr, Nov, Dec
002BOD, carbonaceous [5 day, 20 C]DAILY MX <= 20 mg/L May, Jun, Jul, Aug, Sep, Oct
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 2085 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 1168 lb/d May, Jun, Jul, Aug, Sep, Oct
002BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 3128 lb/d Jan, Feb, Mar, Apr, Nov, Dec
002BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 1751 lb/d May, Jun, Jul, Aug, Sep, Oct
002BOD, carbonaceous, percent removalDAILY MN >= 40 % all year
002BOD, carbonaceous, percent removalMO AV MN >= 85 % all year
002Solids, suspended percent removalDAILY MN >= 40 % all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
002IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 37 % Jan, Feb, Mar, Apr, Nov, Dec
002IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM > 32 % May, Jun, Jul, Aug, Sep, Oct
002IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 32 % May, Jun, Jul, Aug, Sep, Oct
002IC25 Static Renewal 7 Day Chronic ChrpimephalesMINIMUM > 37 % Jan, Feb, Mar, Apr, Nov, Dec
INF1Solids, total suspendedMO AVG report only all year
INF1Solids, total suspendedDAILY MX report only all year
INF1Flow, in conduit or thru treatment plantMO AVG report only all year
INF1Flow, in conduit or thru treatment plantDAILY MX report only all year
INF1BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
INF1BOD, carbonaceous [5 day, 20 C]DAILY MX report only 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