RONAN- CITY OF - WWTF

NPDES permit MT0021474 · Minor POTW · effective, expires 2027-06-30 · 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

8values over a limit
0required values missing, on 0 form(s)
8of 37 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (8).

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 (94)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeINST MIN report only all year
001Temperature, water deg. centigradeINST MAX report only all year
001Oxygen, dissolved [DO]DAILY MN report only all year
001Oxygen, dissolved [DO]30DA AVG report only all year
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHINST MIN >= 6.5 SU all year
001pHINST MAX <= 8.5 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil & GreaseDAILY MX <= 10 mg/L all year
001Nitrogen, total [as N]30DA AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG <= 3.78 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 15.4 mg/L all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Floating solids, waste or visible foam-visualINST MAX <= 0 N=0;Y=1 all year
001Flow, in conduit or thru treatment plant30DA AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001E. coli30DA AVG <= 126 #/100mL all year
001E. coliDAILY MX <= 252 #/100mL all year
001Nitrogen, Kjeldahl Total30DA AVG report only all year
001Nitrogen, Kjeldahl TotalDAILY MX report only all year
001Nitrite Plus Nitrate Total30DA AVG report only all year
001Nitrite Plus Nitrate TotalDAILY MX report only all year
001Solids, total dissolved [TDS]30DA AVG report only all year
001Solids, total dissolved [TDS]DAILY MX report only all year
001Coliform, fecal general30DA AVG <= 200 #/100mL all year
001Coliform, fecal generalDAILY MX <= 400 #/100mL all year
001BOD, 5-day, percent removalMINIMUM >= 85 % all year
001Solids, suspended percent removalMINIMUM >= 85 % all year
001Oil and grease visualINST MAX <= 0 N=0;Y=1 all year
CC01Temperature, water deg. centigradeINST MIN report only all year
CC01Temperature, water deg. centigradeINST MAX report only all year
CC01pHINST MIN report only all year
CC01pHINST MAX report only all year
CC01Nitrogen, ammonia total [as N]30DA AVG report only all year
CC01Nitrogen, ammonia total [as N]DAILY MX report only all year
IM01Temperature, water deg. centigradeINST MIN report only all year
IM01Temperature, water deg. centigradeINST MAX report only all year
IM01Oxygen, dissolved [DO]DAILY MN report only all year
IM01Oxygen, dissolved [DO]30DA AVG report only all year
IM01BOD, 5-day, 20 deg. C30DA AVG report only all year
IM01BOD, 5-day, 20 deg. CDAILY MX report only all year
IM01pHINST MIN report only all year
IM01pHINST MAX report only all year
IM01Nitrogen, ammonia total [as N]30DA AVG report only all year
IM01Nitrogen, ammonia total [as N]DAILY MX report only all year
IM01Nitrogen, nitrate total [as N]30DA AVG report only all year
IM01Nitrogen, nitrate total [as N]DAILY MX report only all year
IM01BOD, carbonaceous [5 day, 20 C]30DA AVG report only all year
IM01BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
IM01BOD, 5-day, percent removalMINIMUM report only all year
IM02Temperature, water deg. centigradeINST MIN report only all year
IM02Temperature, water deg. centigradeINST MAX report only all year
IM02Oxygen, dissolved [DO]DAILY MN report only all year
IM02Oxygen, dissolved [DO]30DA AVG report only all year
IM02BOD, 5-day, 20 deg. C30DA AVG report only all year
IM02BOD, 5-day, 20 deg. CDAILY MX report only all year
IM02pHINST MIN report only all year
IM02pHINST MAX report only all year
IM02Nitrogen, ammonia total [as N]30DA AVG report only all year
IM02Nitrogen, ammonia total [as N]DAILY MX report only all year
IM02Nitrogen, nitrate total [as N]30DA AVG report only all year
IM02Nitrogen, nitrate total [as N]DAILY MX report only all year
IM02BOD, carbonaceous [5 day, 20 C]30DA AVG report only all year
IM02BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
IM02BOD, 5-day, percent removalMINIMUM report only all year
IM03Temperature, water deg. centigradeINST MIN report only all year
IM03Temperature, water deg. centigradeINST MAX report only all year
IM03Oxygen, dissolved [DO]DAILY MN report only all year
IM03Oxygen, dissolved [DO]30DA AVG report only all year
IM03BOD, 5-day, 20 deg. C30DA AVG report only all year
IM03BOD, 5-day, 20 deg. CDAILY MX report only all year
IM03pHINST MIN report only all year
IM03pHINST MAX report only all year
IM03Nitrogen, ammonia total [as N]30DA AVG report only all year
IM03Nitrogen, ammonia total [as N]DAILY MX report only all year
IM03Nitrogen, nitrate total [as N]30DA AVG report only all year
IM03Nitrogen, nitrate total [as N]DAILY MX report only all year
IM03BOD, carbonaceous [5 day, 20 C]30DA AVG report only all year
IM03BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
IM03BOD, 5-day, percent removalMINIMUM report only all year
RW01Temperature, water deg. centigradeINST MIN report only all year
RW01Temperature, water deg. centigradeINST MAX report only all year
RW01pHINST MIN report only all year
RW01pHINST MAX report only all year
RW01Nitrogen, ammonia total [as N]30DA AVG report only all year
RW01Nitrogen, ammonia total [as N]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