Columbia, City of

NPDES permit MO0112640 · Minor NON-POTW · administratively continued, expires 2025-03-31 · 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.

This permit expired on 2025-03-31 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
0required values missing, on 0 form(s)
5of 39 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 (122)

OutfallParameterStatisticLimitMonths
002Sulfate [as S]DAILY MX report only all year
002Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY MX <= 80 mg/L all year
002Solids, settleableDAILY MX report only all year
002Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Chloride [as Cl]DAILY MX report only all year
002Fluoride, total [as F]DAILY MX report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Iron, total recoverableDAILY MX <= 4000 ug/L all year
002Selenium, total recoverableDAILY MX report only all year
002Thallium, total recoverableDAILY MX report only all year
002Beryllium, total recoverable [as Be]DAILY MX report only all year
002Silver total recoverableDAILY MX report only all year
002Zinc, total recoverableDAILY MX report only all year
002Aluminum, total recoverableDAILY MX <= 750 ug/L all year
002Cadmium, total recoverableDAILY MX report only all year
002Lead, total recoverableDAILY MX report only all year
002Copper, total recoverableDAILY MX report only all year
002Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
002RainfallDAILY MX report only all year
002Storm water flowDAILY MX report only all year
002Chlorides + SulfatesDAILY MX <= 1000 mg/L all year
003Sulfate [as S]DAILY MX report only all year
003Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedDAILY MX <= 80 mg/L all year
003Solids, settleableDAILY MX report only all year
003Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
003Nitrogen, ammonia total [as N]DAILY MX report only all year
003Chloride [as Cl]DAILY MX report only all year
003FluorideDAILY MX report only all year
003Arsenic, total recoverableDAILY MX report only all year
003Iron, total recoverableDAILY MX <= 4000 ug/L all year
003Selenium, total recoverableDAILY MX report only all year
003Thallium, total recoverableDAILY MX report only all year
003Beryllium, total recoverable [as Be]DAILY MX report only all year
003Silver total recoverableDAILY MX report only all year
003Zinc, total recoverableDAILY MX report only all year
003Aluminum, total recoverableDAILY MX <= 750 ug/L all year
003Cadmium, total recoverableDAILY MX report only all year
003Lead, total recoverableDAILY MX report only all year
003Copper, total recoverableDAILY MX report only all year
003Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
003RainfallDAILY MX report only all year
003Storm water flowDAILY MX report only all year
003Chlorides + SulfatesDAILY MX <= 1000 mg/L all year
004Sulfate [as S]DAILY MX report only all year
004Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
004pHMINIMUM >= 6.5 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedDAILY MX <= 80 mg/L all year
004Solids, settleableDAILY MX report only all year
004Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
004Nitrogen, ammonia total [as N]DAILY MX report only all year
004Chloride [as Cl]DAILY MX report only all year
004FluorideDAILY MX report only all year
004Arsenic, total recoverableDAILY MX report only all year
004Iron, total recoverableDAILY MX <= 4000 ug/L all year
004Selenium, total recoverableDAILY MX report only all year
004Thallium, total recoverableDAILY MX report only all year
004Beryllium, total recoverable [as Be]DAILY MX report only all year
004Silver total recoverableDAILY MX report only all year
004Zinc, total recoverableDAILY MX report only all year
004Aluminum, total recoverableDAILY MX <= 750 ug/L all year
004Cadmium, total recoverableDAILY MX report only all year
004Lead, total recoverableDAILY MX report only all year
004Copper, total recoverableDAILY MX report only all year
004Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
004RainfallDAILY MX report only all year
004Storm water flowDAILY MX report only all year
004Chlorides + SulfatesDAILY MX <= 1000 mg/L all year
005Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
005pHMINIMUM >= 6.5 SU all year
005pHMAXIMUM <= 9 SU all year
005Solids, total suspendedDAILY MX report only all year
005Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
005Iron, total recoverableDAILY MX report only all year
005Aluminum, total recoverableDAILY MX report only all year
005RainfallDAILY MX report only all year
005Storm water flowDAILY MX report only all year
006Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
006pHMINIMUM >= 6.5 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspendedDAILY MX <= 100 mg/L all year
006Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
006Iron, total recoverableDAILY MX report only all year
006Aluminum, total recoverableDAILY MX report only all year
006RainfallDAILY MX report only all year
006Storm water flowDAILY MX report only all year
007Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
007pHMINIMUM >= 6.5 SU all year
007pHMAXIMUM <= 9 SU all year
007Solids, total suspendedDAILY MX <= 80 mg/L all year
007Solids, settleableDAILY MX report only all year
007Oil and grease [soxhlet extr.] tot.DAILY MX report only all year
007Chloride [as Cl]DAILY MX report only all year
007Sulfate, total [as SO4]DAILY MX report only all year
007FluorideDAILY MX report only all year
007Arsenic, total recoverableDAILY MX report only all year
007Iron, total recoverableDAILY MX <= 4000 ug/L all year
007Selenium, total recoverableDAILY MX report only all year
007Thallium, total recoverableDAILY MX report only all year
007Beryllium, total recoverable [as Be]DAILY MX report only all year
007Silver total recoverableDAILY MX report only all year
007Zinc, total recoverableDAILY MX report only all year
007Aluminum, total recoverableDAILY MX <= 750 ug/L all year
007Cadmium, total recoverableDAILY MX report only all year
007Lead, total recoverableDAILY MX report only all year
007Copper, total recoverableDAILY MX report only all year
007Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
007Nitrogen, ammonia, total [as NH3]DAILY MX report only all year
007RainfallDAILY MX report only all year
007Storm water flowDAILY MX report only all year
007Chlorides + SulfatesDAILY MX <= 1000 mg/L all year
SM1pHMINIMUM report only all year
SM1pHMAXIMUM report only all year
SM1Carbon, dissolved organic [as C]DAILY MX report only all year
SM1Hardness, total [as CaCO3]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