Sterling City of

NPDES permit CO0026247 · Major POTW · administratively continued, expires 2017-02-28 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2017-02-28 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

0values over a limit
2required values missing, on 1 form(s)
1of 93 forms filed late

Last period with anything received: 2026-07-31.

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 (224)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMX WK AV report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
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
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 75 mg/L all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 110 mg/L all year
001Solids, total suspendedMX 7D AV <= 45 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 10.4 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 8.6 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 7.3 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 5.9 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 2.9 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 4.8 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 4.9 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 8 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 8.2 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 8 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 6 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 7.1 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 40 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 31 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 39 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 34 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 18 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 13 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 13 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 24 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 22 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 29 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 19 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 18 mg/L Dec
001Nitrogen, nitrite total [as N]30DA AVG report only all year
001Nitrogen, nitrite total [as N]30DA 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
001Chloride [as Cl]30DA AVG report only all year
001Chloride [as Cl]30DA AVG report only all year
001Iron, total recoverable30DA AVG report only all year
001Iron, total recoverable30DA AVG report only all year
001Silver, potentially dissolved30DA AVG <= 5 ug/L all year
001Silver, potentially dissolved30DA AVG <= 5 ug/L all year
001Silver, potentially dissolvedDAILY MX <= 75 ug/L all year
001Silver, potentially dissolvedDAILY MX <= 75 ug/L all year
001Copper, potentially dissolved30DA AVG <= 38 ug/L all year
001Copper, potentially dissolved30DA AVG <= 38 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 160 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 160 ug/L all year
001Cadmium, potentially dissolvd30DA AVG report only all year
001Cadmium, potentially dissolvd30DA AVG report only all year
001Cadmium, potentially dissolvdDAILY MX report only all year
001Cadmium, potentially dissolvdDAILY MX report only all year
001Lead, potentially dissolvd30DA AVG report only all year
001Lead, potentially dissolvd30DA AVG report only all year
001Lead, potentially dissolvdDAILY MX report only all year
001Lead, potentially dissolvdDAILY MX report only all year
001Manganese, potentially dissolvd30DA AVG report only all year
001Manganese, potentially dissolvd30DA AVG report only all year
001Manganese, potentially dissolvdDAILY MX report only all year
001Manganese, potentially dissolvdDAILY MX report only all year
001Selenium, potentially dissolvd30DA AVG <= 5 ug/L all year
001Selenium, potentially dissolvd30DA AVG <= 5 ug/L all year
001Selenium, potentially dissolvdDAILY MX <= 53 ug/L all year
001Selenium, potentially dissolvdDAILY MX <= 53 ug/L all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Radium 226 + radium 228, total30DA AVG report only all year
001Radium 226 + radium 228, totalDAILY MX report only all year
001Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
001Flow, in conduit or thru treatment plant30DA AVG <= 2.68 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG report only all year
001Chlorine, total residual30DA AVG <= .041 mg/L all year
001Chlorine, total residualINST MAX <= .1 mg/L all year
001Chlorine, total residualINST MAX <= .065 mg/L all year
001Chlordane30DA AVG report only all year
001ChlordaneDAILY MX report only all year
001E. coli30DA GM <= 131 #/100mL all year
001E. coli30DA GM <= 131 #/100mL all year
001E. coliMX 7D GM <= 262 #/100mL all year
001E. coliMX 7D GM <= 262 #/100mL all year
001Nonylphenol30DA AVG report only all year
001NonylphenolDAILY MX report only all year
001Mercury, total [as Hg]30DA AVG report only all year
001Mercury, total [as Hg]30DA AVG <= .034 ug/L all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Oil and grease visualINST MAX report only all year
001Oil and grease visualINST MAX report only all year
001Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
001Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 27 tox chronic all year
001Static Renewal 7 Day Chronic Pimephales promelasSINGSAMP report only all year
001Static Renewal 7 Day Chronic Pimephales promelasMN VALUE report only all year
001Static Renewal 7 Day Chronic Pimephales promelasMN VALUE >= 27 tox chronic all year
002Temperature, water deg. centigradeMX WK AV report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CMX 7D AV <= 45 mg/L all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspended30DA AVG <= 30 mg/L all year
002Solids, total suspendedMX 7D AV <= 45 mg/L all year
002Nitrogen, ammonia total [as N]30DA AVG report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, nitrite total [as N]30DA AVG report only all year
002Nitrogen, nitrite total [as N]DAILY MX report only all year
002Chloride [as Cl]30DA AVG report only all year
002Iron, total recoverable30DA AVG report only all year
002Silver, potentially dissolved30DA AVG <= 5 ug/L all year
002Silver, potentially dissolvedDAILY MX <= 75 ug/L all year
002Copper, potentially dissolved30DA AVG <= 38 ug/L all year
002Copper, potentially dissolvedDAILY MX <= 160 ug/L all year
002Cadmium, potentially dissolvd30DA AVG report only all year
002Cadmium, potentially dissolvdDAILY MX report only all year
002Lead, potentially dissolvd30DA AVG report only all year
002Lead, potentially dissolvdDAILY MX report only all year
002Manganese, potentially dissolvd30DA AVG report only all year
002Manganese, potentially dissolvdDAILY MX report only all year
002Selenium, potentially dissolvd30DA AVG <= 5 ug/L all year
002Selenium, potentially dissolvdDAILY MX <= 53 ug/L all year
002Oil and greaseINST MAX <= 10 mg/L all year
002Radium 226 + radium 228, total30DA AVG report only all year
002Radium 226 + radium 228, totalDAILY MX report only all year
002Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
002Flow, in conduit or thru treatment plant30DA AVG <= 2.68 MGD all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residual30DA AVG report only all year
002Chlorine, total residualINST MAX <= .5 mg/L all year
002Chlordane30DA AVG report only all year
002ChlordaneDAILY MX report only all year
002Nonylphenol30DA AVG report only all year
002NonylphenolDAILY MX report only all year
002Mercury, total [as Hg]30DA AVG report only all year
002Mercury, total [as Hg]30DA AVG <= .034 ug/L all year
002BOD, 5-day, percent removalMO AV MN >= 85 % all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
002Oil and grease visualINST MAX report only all year
002Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only all year
002Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
002Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 27 tox chronic all year
002Static Renewal 7 Day Chronic Pimephales promelasSINGSAMP report only all year
002Static Renewal 7 Day Chronic Pimephales promelasMN VALUE report only all year
002Static Renewal 7 Day Chronic Pimephales promelasMN VALUE >= 27 tox chronic all year
050pHMINIMUM >= 6.5 SU all year
050pHMINIMUM >= 6.5 SU all year
050pHMINIMUM >= 6.5 SU all year
050pHMINIMUM >= 6.5 SU all year
050pHMAXIMUM <= 8.5 SU all year
050pHMAXIMUM <= 8.5 SU all year
050pHMAXIMUM <= 8.5 SU all year
050pHMAXIMUM <= 8.5 SU all year
050pHMINIMUM >= 6.5 SU all year
050pHMINIMUM >= 6.5 SU all year
050pHMINIMUM >= 6.5 SU all year
050pHMINIMUM >= 6.5 SU all year
050pHMAXIMUM <= 8.5 SU all year
050pHMAXIMUM <= 8.5 SU all year
050pHMAXIMUM <= 9 SU all year
050pHMAXIMUM <= 8.5 SU all year
050Nitrogen, inorganic totalDAILY MX <= 10 mg/L all year
050Nitrogen, inorganic totalDAILY MX <= 10 mg/L all year
050Nitrogen, inorganic totalDAILY MX <= 10 mg/L all year
050Nitrogen, inorganic totalDAILY MX <= 10 mg/L all year
050Nitrogen, inorganic totalDAILY MX report only all year
050Nitrogen, inorganic totalDAILY MX report only all year
050Nitrogen, inorganic totalDAILY MX report only all year
050Nitrogen, inorganic totalDAILY MX report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Iron, dissolved [as Fe]30DA AVG report only all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 9.2 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 2.5 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 2.5 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 2.5 ug/L all year
050Di[2-ethylhexyl] phthalate [DEHP]30DA AVG <= 2.5 ug/L all year
050Solids, total dissolved30DA AVG report only all year
050Solids, total dissolved30DA AVG report only all year
050Solids, total dissolved30DA AVG report only all year
050Solids, total dissolved30DA AVG report only all year
050Coliform, total general30DA AVG <= 2.2 #/100mL all year
050Coliform, total general30DA AVG <= 2.2 #/100mL all year
050Coliform, total general30DA AVG <= 2.2 #/100mL all year
050Coliform, total general30DA AVG <= 2.2 #/100mL all year
050Coliform, total generalDAILY MX <= 23 #/100mL all year
050Coliform, total generalDAILY MX <= 23 #/100mL all year
050Coliform, total generalDAILY MX <= 23 #/100mL all year
050Coliform, total generalDAILY MX <= 23 #/100mL all year
050Water level relative to mean sea level30DA AVG report only all year
050Water level relative to mean sea level30DA AVG report only all year
050Water level relative to mean sea level30DA AVG report only all year
050Water level relative to mean sea level30DA AVG 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. C30DA AVG report only all year
300BOD, 5-day, 20 deg. CMX 7D AV 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. C30DA AVG report only all year
300BOD, 5-day, 20 deg. CMX 7D AV 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 suspended30DA AVG report only all year
300Solids, total suspendedMX 7D AV 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

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