UNITED STATES BUREAU OF RECLAMATION

NPDES permit CO0021717 · Major FEDERAL · administratively continued, expires 2021-12-31 · 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 2021-12-31 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)
0of 33 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 (59)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMX WK AV <= 17 deg C Jun, Jul, Aug, Sep
001Temperature, water deg. centigradeMX WK AV <= 9 deg C Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001Temperature, water deg. centigradeDAILY MX <= 21.7 deg C Jun, Jul, Aug, Sep
001Temperature, water deg. centigradeDAILY MX <= 13 deg C Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Oil & GreaseDAILY MX <= 10 mg/L all year
001Nitrogen, total [as N]DAILY MX report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Cyanide, total [as CN]DAILY MX report only Apr, May, Jun
001Hardness, total [as CaCO3]DAILY MX report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Iron, total recoverable30DA AVG <= 1000 ug/L all year
001Iron, total recoverableDAILY MX report only all year
001Selenium, total recoverable30DA AVG <= 4.6 ug/L all year
001Selenium, total recoverableDAILY MX <= 18.4 ug/L all year
001Barium, total [as Ba]DAILY MX report only Apr, May, Jun
001Beryllium, total [as Be]DAILY MX report only Apr, May, Jun
001Chromium, total [as Cr]DAILY MX report only Apr, May, Jun
001Cobalt, total [as Co]DAILY MX report only Apr, May, Jun
001Thallium, total [as Tl]DAILY MX report only Apr, May, Jun
001Molybdenum, total [as Mo]DAILY MX report only Apr, May, Jun
001Nickel, total [as Ni]DAILY MX report only all year
001Antimony, total [as Sb]DAILY MX report only Apr, May, Jun
001Tin, total [as Sn]DAILY MX report only Apr, May, Jun
001Titanium, total [as Ti]DAILY MX report only Apr, May, Jun
001Zinc, potentially dissolved30DA AVG <= 84 ug/L all year
001Zinc, potentially dissolvedDAILY MX <= 284 ug/L all year
001Silver, potentially dissolved30DA AVG <= .035 ug/L all year
001Silver, potentially dissolvedDAILY MX <= .83 ug/L all year
001Copper, potentially dissolved30DA AVG <= 14 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 23 ug/L all year
001Aluminum, potentially dissolvd30DA AVG <= 87 ug/L all year
001Aluminum, potentially dissolvdDAILY MX <= 750 ug/L all year
001Cadmium, potentially dissolvd30DA AVG <= .9 ug/L all year
001Cadmium, potentially dissolvdDAILY MX <= 1.2 ug/L all year
001Lead, potentially dissolvd30DA AVG <= 1.5 ug/L all year
001Lead, potentially dissolvdDAILY MX <= 32 ug/L all year
001Total phenolsDAILY MX report only Apr, May, Jun
001Manganese, total recoverable30DA AVG <= 1000 ug/L all year
001Manganese, total recoverableDAILY MX <= 4694 ug/L all year
001Floating solids, waste or visible foam-visualINST MAX <= 0 N=0;Y=1 all year
001Flow, in conduit or thru treatment plant30DA AVG <= 2.5 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 3.2 MGD all year
001Mercury, total [as Hg]30DA AVG <= .01 ug/L all year
001Mercury, total [as Hg]DAILY MX report only all year
001Oil and grease visualINST MAX <= 0 N=0;Y=1 all year
EF1Hardness, total [as CaCO3]MINIMUM report only all year
EF1Hardness, total [as CaCO3]MO AVG report only all year
EF1Hardness, total [as CaCO3]MAXIMUM report only all year
EF1FlowMO AVG report only all year
EF1FlowDAILY MX report only all year
EF2Hardness, total [as CaCO3]MINIMUM report only all year
EF2Hardness, total [as CaCO3]MO AVG report only all year
EF2Hardness, total [as CaCO3]MAXIMUM report only all year
EF2FlowMO AVG report only all year
EF2FlowDAILY 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