St Marys Glacier WSD

NPDES permit CO0023094 · Minor POTW · administratively continued, expires 2021-06-30 · 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 2021-06-30 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

11values over a limit
0required values missing, on 0 form(s)
0of 52 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, potentially dissolved (8), Cadmium, potentially dissolvd (1), pH (1).

Reporting

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

Limits in force (160)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG <= 150 lb/d all year
001BOD, 5-day, 20 deg. C30DA AVG <= 63 lb/d all year
001pHMINIMUM >= 6.5 SU all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 63 lb/d all year
001Solids, total suspended30DA AVG <= 150 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 28.5 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 29 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 30.6 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 3.9 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 31.8 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 4.4 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 10.7 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 23.8 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 28.7 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 5.4 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 23.2 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 22.8 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 7.2 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 7.2 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 7.8 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 4.5 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 8.1 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 1.6 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 1.8 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 8.4 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 7.1 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 7.5 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 7.3 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 2.2 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 7.9 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 8.9 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 9.6 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 8 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 9.2 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 8.9 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 4.4 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 3.9 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 5.4 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 8.2 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 8 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 7.7 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Apr
001Nitrogen, ammonia total [as N]DAILY MX report only Jan
001Nitrogen, ammonia total [as N]DAILY MX report only Feb
001Nitrogen, ammonia total [as N]DAILY MX report only Aug
001Nitrogen, ammonia total [as N]DAILY MX report only May
001Nitrogen, ammonia total [as N]DAILY MX report only Jul
001Nitrogen, ammonia total [as N]DAILY MX report only Jun
001Nitrogen, ammonia total [as N]DAILY MX report only Dec
001Nitrogen, ammonia total [as N]DAILY MX report only Mar
001Nitrogen, ammonia total [as N]DAILY MX report only Sep
001Nitrogen, ammonia total [as N]DAILY MX report only Nov
001Nitrogen, ammonia total [as N]DAILY MX report only Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 21.1 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 26.9 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 21.1 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 31.8 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 28.6 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 28.3 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 30.5 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 27.8 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 27 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 26.5 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 30.4 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 28 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 22 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 29 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 21 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 34 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 31 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 29 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 32 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 31 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 27 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 28 mg/L Dec
001Oil and greaseINST MAX <= 10 mg/L all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Flow, in conduit or thru treatment plant30DA AVG <= .25 MGD all year
001Flow, in conduit or thru treatment plant30DA AVG <= .6 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG <= .01 mg/L all year
001Chlorine, total residual30DA AVG <= .01 mg/L all year
001Chlorine, total residualINST MAX <= .02 mg/L all year
001E. coli30DA GM <= 148 #/100mL all year
001E. coli30DA GM <= 157 #/100mL all year
001E. coliMX 7D GM <= 296 #/100mL all year
001E. coliMX 7D GM <= 314 #/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001BOD, 5-day, percent removalMO AV MN report only all year
001BOD, 5-day, percent removalMO AV MN report only all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN report only all year
001Solids, suspended percent removalMO AV MN report only all year
001Oil and grease visualINST MAX report only all year
001Oil and grease visualINST MAX report only all year
001Oil and grease visualDAILY MX report only all year
001AZinc, potentially dissolved30DA AVG report only all year
001AZinc, potentially dissolved30DA AVG <= 46 ug/L all year
001AZinc, potentially dissolvedDAILY MX report only all year
001AZinc, potentially dissolvedDAILY MX <= 49 ug/L all year
001ACopper, potentially dissolved30DA AVG report only all year
001ACopper, potentially dissolved30DA AVG <= 2.7 ug/L all year
001ACopper, potentially dissolvedDAILY MX report only all year
001ACopper, potentially dissolvedDAILY MX <= 3.6 ug/L all year
001ACopper, potentially dissolvedDAILY MX <= .15 lb/d all year
001ACopper, potentially dissolvedDAILY MX <= .015 lb/d all year
001ACadmium, potentially dissolvd30DA AVG report only all year
001ACadmium, potentially dissolvd30DA AVG <= .15 ug/L all year
001ACadmium, potentially dissolvdDAILY MX report only all year
001ACadmium, potentially dissolvdDAILY MX report only all year
001ALead, potentially dissolvd30DA AVG report only all year
001ALead, potentially dissolvd30DA AVG <= .54 ug/L all year
001ALead, potentially dissolvdDAILY MX report only all year
001ALead, potentially dissolvdDAILY MX report only all year
001BZinc, potentially dissolved30DA AVG report only all year
001BZinc, potentially dissolved30DA AVG <= 39 ug/L all year
001BZinc, potentially dissolvedDAILY MX report only all year
001BZinc, potentially dissolvedDAILY MX <= 47 ug/L all year
001BCopper, potentially dissolved30DA AVG report only all year
001BCopper, potentially dissolved30DA AVG <= 2.7 ug/L all year
001BCopper, potentially dissolvedDAILY MX report only all year
001BCopper, potentially dissolvedDAILY MX <= 3.6 ug/L all year
001BCopper, potentially dissolvedDAILY MX <= .15 lb/d all year
001BCopper, potentially dissolvedDAILY MX <= .015 lb/d all year
001BCadmium, potentially dissolvd30DA AVG report only all year
001BCadmium, potentially dissolvd30DA AVG <= .15 ug/L all year
001BCadmium, potentially dissolvdDAILY MX report only all year
001BCadmium, potentially dissolvdDAILY MX report only all year
001BLead, potentially dissolvd30DA AVG report only all year
001BLead, potentially dissolvd30DA AVG <= .5 ug/L all year
001BLead, potentially dissolvdDAILY MX report only all year
001BLead, potentially dissolvdDAILY MX report only all year
300Plant capacity fact. percent of capacity30DA AVG report only all year
300Plant capacity fact. percent of capacity30DA AVG report only all year
300BOD, 5-day, 20 deg. C30DA AVG report only all year
300BOD, 5-day, 20 deg. CMX 7D AV report only all year
300BOD, 5-day, 20 deg. C30DA AVG report only all year
300BOD, 5-day, 20 deg. CMX 7D AV report only all year
300Solids, total suspended30DA AVG report only all year
300Solids, total suspendedMX 7D AV report only all year
300Flow, in conduit or thru treatment plant30DA AVG report only all year
300Flow, in conduit or thru treatment plantDAILY MX report only all year
UST1Temperature, water deg. centigradeMX WK AV report only all year
UST1Temperature, water deg. centigradeDAILY 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