Gypsum Town of

NPDES permit CO0048830 · Minor POTW · administratively continued, expires 2026-01-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2026-01-31 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

31values over a limit
0required values missing, on 0 form(s)
0of 24 forms filed late

Last period with anything received: 2026-07-31. Most often over: Acrylamide (11), Nitrogen, nitrite total [as N] (11), Nitrogen, ammonia total [as N] (9).

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 (119)

OutfallParameterStatisticLimitMonths
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
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 <= 45 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 17 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 13 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 29 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 26 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 49 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 43 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 21 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 10 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 31 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 53 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 21 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 15 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 14 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 13 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 3 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 17 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 27 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 26 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 21 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 18 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 18 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 21 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 15 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 2.6 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 55 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 25 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 21 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 65 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 50 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 65 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 59 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 40 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 26 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 38 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 33 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 34 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 21 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 25 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 30 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 37 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 65 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 65 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 59 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 50 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 38 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 33 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 34 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 26 mg/L Dec
001Nitrogen, ammonia total [as N]ROLL AVG <= 13 mg/L Oct
001Nitrogen, ammonia total [as N]ROLL AVG <= 8.4 mg/L Jan
001Nitrogen, ammonia total [as N]ROLL AVG <= 10 mg/L Aug
001Nitrogen, ammonia total [as N]ROLL AVG <= 11 mg/L Sep
001Nitrogen, ammonia total [as N]ROLL AVG <= 8.5 mg/L Nov
001Nitrogen, ammonia total [as N]ROLL AVG <= 16 mg/L Jul
001Nitrogen, ammonia total [as N]ROLL AVG report only Feb
001Nitrogen, ammonia total [as N]ROLL AVG report only Apr
001Nitrogen, ammonia total [as N]ROLL AVG report only May
001Nitrogen, ammonia total [as N]ROLL AVG report only all year
001Nitrogen, ammonia total [as N]ROLL AVG <= 1.9 mg/L Jan
001Nitrogen, ammonia total [as N]ROLL AVG <= 2 mg/L Feb
001Nitrogen, ammonia total [as N]ROLL AVG <= 2.6 mg/L Apr
001Nitrogen, ammonia total [as N]ROLL AVG <= 3 mg/L May
001Nitrogen, ammonia total [as N]ROLL AVG <= 3.2 mg/L Jun
001Nitrogen, ammonia total [as N]ROLL AVG <= 2.9 mg/L Jul
001Nitrogen, ammonia total [as N]ROLL AVG <= 2.7 mg/L Aug
001Nitrogen, ammonia total [as N]ROLL AVG <= 2.6 mg/L Sep
001Nitrogen, ammonia total [as N]ROLL AVG <= 3 mg/L Oct
001Nitrogen, ammonia total [as N]ROLL AVG <= 2.2 mg/L Nov
001Nitrogen, nitrite total [as N]DAILY MX <= .28 mg/L all year
001Nitrogen, nitrite total [as N]30DA AVG <= .05 mg/L all year
001Nitrogen, inorganic totalDAILY MX <= 45 mg/L all year
001Cyanide, total [as CN]DAILY MX report only all year
001Arsenic, total recoverable30DA AVG report only all year
001Arsenic, total [as As]DAILY MX report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Molybdenum, total [as Mo]DAILY MX report only all year
001Nickel, total [as Ni]DAILY MX report only all year
001Silver, total [as Ag]DAILY MX report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Selenium, total [as Se]DAILY MX report only all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Total phenolsDAILY MX report only all year
001Flow, in conduit or thru treatment plant30DA AVG <= .96 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residual30DA AVG <= .5 mg/L all year
001Chlorine, total residualINST MAX <= .5 mg/L all year
001Acrylamide30DA AVG <= .46 ug/L all year
001AcrylamideROLL AVG report only all year
001AcrylamideROLL AVG <= .052 ug/L all year
001E. coli30DA GM <= 1388 #/100mL all year
001E. coliMX 7D GM <= 2776 #/100mL all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolved30DA AVG report only all year
001Mercury, total [as Hg]30DA AVG report only all year
001Mercury, total [as Hg]DAILY MX report only 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
001LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaMN VALUE >= 100 % all year
001LC50 Static Renewal 96Hr Acute Pimephales promelasMN VALUE >= 100 % 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

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