Caldera Holding LLC

NPDES permit MO0000574 · Major NON-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

5values over a limit
2required values missing, on 1 form(s)
4of 12 forms filed late

Last period with anything received: 2026-07-31. Most often over: Lead, total recoverable (2), Copper, total recoverable (2), Iron, total recoverable (1).

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 (46)

OutfallParameterStatisticLimitMonths
001Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
001Oxygen demand, chem. [high level] [COD]MO AVG report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 20 mg/L all year
001Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
001Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
001Sulfate, total [as SO4]DAILY MX report only all year
001Sulfate, total [as SO4]MO AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Arsenic, total recoverableMO AVG report only all year
001Iron, total recoverableDAILY MX <= 1462.8 ug/L all year
001Iron, total recoverableMO AVG <= 438.2 ug/L all year
001Selenium, total recoverableDAILY MX report only all year
001Selenium, total recoverableMO AVG report only all year
001Thallium, total recoverableDAILY MX report only all year
001Thallium, total recoverableMO AVG report only all year
001Beryllium, total recoverable [as Be]DAILY MX report only all year
001Beryllium, total recoverable [as Be]MO AVG report only all year
001Nickel, total recoverableDAILY MX report only all year
001Nickel, total recoverableMO AVG report only all year
001Silver total recoverableDAILY MX <= 9.4 ug/L all year
001Silver total recoverableMO AVG <= 3.8 ug/L all year
001Zinc, total recoverableDAILY MX <= 188.2 ug/L all year
001Zinc, total recoverableMO AVG <= 56.8 ug/L all year
001Aluminum, total recoverableDAILY MX <= 750 ug/L all year
001Aluminum, total recoverableMO AVG <= 248.5 ug/L all year
001Cadmium, total recoverableDAILY MX report only all year
001Cadmium, total recoverableMO AVG report only all year
001Lead, total recoverableDAILY MX <= 11.1 ug/L all year
001Lead, total recoverableMO AVG <= 3.7 ug/L all year
001Copper, total recoverableDAILY MX <= 23.1 ug/L all year
001Copper, total recoverableMO AVG <= 9.3 ug/L all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
001Chromium, trivalent total recoverableDAILY MX report only all year
001Chromium, trivalent total recoverableMO AVG report only all year
001ChlorideDAILY MX report only all year
001ChlorideMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only all year
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX report only all year
001Chlorides + SulfatesDAILY MX report only all year
001Chlorides + SulfatesMO AVG 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