SWG Arapahoe LLC

NPDES permit CO0000002 · Minor NON-POTW · administratively continued, expires 2022-11-30 · 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 2022-11-30 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

4values over a limit
0required values missing, on 0 form(s)
0of 21 forms filed late

Last period with anything received: 2026-07-31. Most often over: Flow, in conduit or thru treatment plant (2), Sulfate (2).

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 (62)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedMX 7D AV <= 61 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 4.6 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 5.4 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 5.2 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 3.4 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 4.3 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 4 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 3.5 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 4.9 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 4.8 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 4.6 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 4.2 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 9.8 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 9.8 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 9.1 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 10 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 12 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 11 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 9.1 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 12 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 13 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 12 mg/L Sep
001Nitrogen, inorganic totalDAILY MX report only all year
001Cyanide, weak acid, dissociableDAILY MX report only all year
001Chloride [as Cl]30DA AVG report only all year
001Arsenic, total recoverable30DA AVG report only all year
001Iron, dissolved [as Fe]30DA AVG report only all year
001Nickel, total recoverable30DA AVG report only all year
001Zinc, total recoverable30DA AVG <= 712 ug/L all year
001Cadmium, total recoverableDAILY MX report only all year
001Lead, total recoverableDAILY MX report only all year
001Chromium, total recoverable30DA AVG <= 142 ug/L all year
001Molybdenum, total recoverable30DA AVG report only all year
001Chromium, hexavalent dissolved [as Cr]30DA AVG <= 14 ug/L all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001Copper, potentially dissolved30DA AVG report only all year
001Copper, potentially dissolved30DA AVG <= 25 ug/L all year
001Copper, potentially dissolvedDAILY MX report only all year
001Copper, potentially dissolvedDAILY MX <= 37 ug/L all year
001Cadmium, potentially dissolvd30DA AVG report only all year
001Cadmium, potentially dissolvdDAILY MX report only all year
001Selenium, potentially dissolvd30DA AVG report only all year
001Selenium, potentially dissolvd30DA AVG <= 4.9 ug/L all year
001Selenium, potentially dissolvdDAILY MX report only all year
001Selenium, potentially dissolvdDAILY MX <= 21 ug/L all year
001Oil and grease30DA AVG <= 4.3 mg/L all year
001Oil and greaseINST MAX <= 13 mg/L all year
001Flow, in conduit or thru treatment plant30DA AVG <= .15 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG <= .014 mg/L all year
001Chlorine, total residualINST MAX <= .023 mg/L all year
001Mercury, total [as Hg]30DA AVG report only all year
001Sulfate30DA AVG <= 270 mg/L all year
001Oil and grease visualINST MAX report only all year
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % all year
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % 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