City Of Flagstaff - Wildcat Hill Wwtp

NPDES permit AZ0020427 · Major POTW · effective, expires 2031-04-21 · EPA's file as of 2026-09-26

Keep this permit as a site — opens New site at EPA's facility point (35.22477, -111.55495); you set the radius.

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.

These are the last limits EPA's file holds for this permit, from an earlier version of it (version 5 in EPA's file): its current version carries none yet. Read your permit: a renewal can change them.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 26 forms filed late

Last period with anything received: 2026-03-31.

Reporting

Reports are due about 30 days after each monitoring period ends (the most common figure among AZ permits in EPA's filings — check your permit).

How strict are these limits?

Each concentration limit against the same limit in comparable permits. Where it appears more than once, its strictest value.

Limits in force (229)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigrademonthly average report only all year
001Temperature, water deg. centigradedaily maximum report only all year
001Temperature, water deg. centigradedaily maximum report only all year
001Oxygen, dissolved [DO]daily maximum report only all year
001BOD, 5-day, 20 deg. Cmonthly average <= 30 mg/L all year
001BOD, 5-day, 20 deg. Cweekly average <= 45 mg/L all year
001BOD, 5-day, 20 deg. Cdaily maximum report only all year
001BOD, 5-day, 20 deg. Cmonthly average <= 680 kg/d all year
001BOD, 5-day, 20 deg. Cweekly average <= 1000 kg/d all year
001pHminimum report only all year
001pHminimum >= 6.5 SU all year
001pHmaximum report only all year
001pHmaximum <= 9 SU all year
001Solids, total suspendedmonthly average <= 30 mg/L all year
001Solids, total suspendedweekly average <= 45 mg/L all year
001Solids, total suspendeddaily maximum report only all year
001Solids, total suspendedmonthly average <= 680 kg/d all year
001Solids, total suspendedweekly average <= 1000 kg/d all year
001Oil & Greasemonthly average report only all year
001Oil & Greasedaily maximum report only all year
001Nitrogen, ammonia total [as N]monthly average <= 1 Ratio all year
001Nitrogen, ammonia total [as N]daily maximum report only all year
001Nitrogen, ammonia total [as N]daily maximum <= 2 Ratio all year
001Nitrogen, Kjeldahl, total [as N]daily maximum report only all year
001Nitrite + Nitrate total [as N]daily maximum report only all year
001Phosphorus, total [as P]daily maximum report only all year
001Cyanide, total [as CN]monthly average <= 7.9 ug/L all year
001Cyanide, total [as CN]daily maximum <= 16 ug/L all year
001Cyanide, total [as CN]daily maximum report only all year
001Cyanide, total [as CN]monthly average <= 180 g/d all year
001Cyanide, total [as CN]daily maximum <= 360 g/d all year
001Sulfide, total [as S]daily maximum report only all year
001Hardness, total [as CaCO3]daily maximum report only all year
001Fluoride, total [as F]daily maximum report only all year
001Arsenic, total recoverabledaily maximum report only all year
001Iron, total recoverabledaily maximum report only all year
001Iron, total recoverabledaily maximum report only all year
001Selenium, total recoverablemonthly average <= 2 ug/L all year
001Selenium, total recoverabledaily maximum <= 3 ug/L all year
001Selenium, total recoverabledaily maximum report only all year
001Selenium, total recoverablemonthly average <= 40 g/d all year
001Selenium, total recoverabledaily maximum <= 64 g/d all year
001Thallium, total recoverabledaily maximum report only all year
001Beryllium, total recoverable [as Be]daily maximum report only all year
001Boron, total recoverabledaily maximum report only all year
001Barium, total recoverabledaily maximum report only all year
001Nickel, total recoverabledaily maximum report only all year
001Silver total recoverabledaily maximum report only all year
001Zinc, total recoverabledaily maximum report only all year
001Cadmium, total recoverabledaily maximum report only all year
001Lead, total recoverabledaily maximum report only all year
001Chromium, total recoverabledaily maximum report only all year
001Copper, total recoverablemonthly average <= 24 ug/L all year
001Copper, total recoverabledaily maximum report only all year
001Copper, total recoverabledaily maximum <= 36 ug/L all year
001Copper, total recoverablemonthly average <= 550 g/d all year
001Copper, total recoverabledaily maximum <= 820 g/d all year
001Chromium, hexavalent dissolved [as Cr]daily maximum report only all year
001Antimony, total recoverabledaily maximum report only all year
0012-Methyl-4,6-dinitrophenoldaily maximum report only all year
001Tributyltindaily maximum report only all year
001Diquatdaily maximum report only all year
001Manganese, total recoverabledaily maximum report only all year
001Uranium, total as U3O8daily maximum report only all year
001Dinosebdaily maximum report only all year
001Dichlorobromomethanedaily maximum report only all year
001Carbon tetrachloridedaily maximum report only all year
0011,2-Dichloroethanedaily maximum report only all year
001Bromoformdaily maximum report only all year
001Dibromochloromethanedaily maximum report only all year
001Chloroformdaily maximum report only all year
001Toluenedaily maximum report only all year
001Benzenedaily maximum report only all year
001.delta.-BHCdaily maximum report only all year
001Acenaphthylenedaily maximum report only all year
001Acenaphthenedaily maximum report only all year
001Acroleindaily maximum report only all year
001Acrylonitriledaily maximum report only all year
001Anthracenedaily maximum report only all year
001Benzo[b]fluoranthenedaily maximum report only all year
001Benzo[k]fluoranthenedaily maximum report only all year
001Benzo[a]pyrenedaily maximum report only all year
001Bis[2-chloroethyl] etherdaily maximum report only all year
001Bis[2-chloroethoxy]methanedaily maximum report only all year
001Bis[2-chloroisopropyl] etherdaily maximum report only all year
001Butyl benzyl phthalatedaily maximum report only all year
001Chlorobenzenedaily maximum report only all year
001Chrysenedaily maximum report only all year
001Diethyl phthalatedaily maximum report only all year
001Dimethyl phthalatedaily maximum report only all year
0011,2-Diphenylhydrazinedaily maximum report only all year
001Endosulfan sulfatedaily maximum report only all year
001Endrin aldehydedaily maximum report only all year
001Ethylbenzenedaily maximum report only all year
001Fluoranthenedaily maximum report only all year
001Fluorenedaily maximum report only all year
001Hexachlorocyclopentadienedaily maximum report only all year
001Hexachlorobutadienedaily maximum report only all year
001Hexachloroethanedaily maximum report only all year
001Indeno[1,2,3-cd]pyrenedaily maximum report only all year
001Isophoronedaily maximum report only all year
001Methyl bromide [Bromomethane]daily maximum report only all year
001Methyl chloride [Chloromethane]daily maximum report only all year
001Methylene chloridedaily maximum report only all year
001N-Nitrosodi-N-propylaminedaily maximum report only all year
001N-Nitrosodiphenylaminedaily maximum report only all year
001N-Nitrosodimethylamine [NDMA]daily maximum report only all year
001Nitrobenzenedaily maximum report only all year
001Phenanthrenedaily maximum report only all year
001Pyrenedaily maximum report only all year
001Tetrachloroethylenedaily maximum report only all year
0011,1-Dichloroethanedaily maximum report only all year
0011,1-Dichloroethylenedaily maximum report only all year
0011,1,1-Trichloroethanedaily maximum report only all year
0011,1,2-Trichloroethanedaily maximum report only all year
0011,1,2,2-Tetrachloroethanedaily maximum report only all year
001Benzo[ghi]perylenedaily maximum report only all year
001Benzo[a]anthracenedaily maximum report only all year
0011,2-Dichlorobenzenedaily maximum report only all year
0011,2-Dichloropropanedaily maximum report only all year
001trans-1,2-Dichloroethylenedaily maximum report only all year
0011,2,4-Trichlorobenzenedaily maximum report only all year
001Dibenz[a,h]anthracenedaily maximum report only all year
0011,3-Dichlorobenzenedaily maximum report only all year
0011,4-Dichlorobenzenedaily maximum report only all year
0012-Chloroethyl vinyl ether, [mixed]daily maximum report only all year
0012-Chloronaphthalenedaily maximum report only all year
0012-Chlorophenoldaily maximum report only all year
0012-Nitrophenoldaily maximum report only all year
001Di-n-octyl phthalatedaily maximum report only all year
0012,4-Dichlorophenoldaily maximum report only all year
0012,4-Dimethylphenoldaily maximum report only all year
0012,4-Dinitrotoluenedaily maximum report only all year
0012,4-Dinitrophenoldaily maximum report only all year
0012,4,6-Trichlorophenoldaily maximum report only all year
0012,6-Dinitrotoluenedaily maximum report only all year
0013,3'-Dichlorobenzidinedaily maximum report only all year
0014-Bromophenyl phenyl etherdaily maximum report only all year
0014-Chlorophenyl phenyl etherdaily maximum report only all year
0014-Nitrophenoldaily maximum report only all year
0012,3,7,8-Tetrachlorodibenzo-p-dioxindaily maximum report only all year
001Phenoldaily maximum report only all year
001Naphthalenedaily maximum report only all year
001Dalapondaily maximum report only all year
001Oxamyldaily maximum report only all year
001Pentachlorophenoldaily maximum report only all year
001Atrazinedaily maximum report only all year
001Simazinedaily maximum report only all year
001Di[2-ethylhexyl] phthalate [DEHP]daily maximum report only all year
001Di-n-butyl phthalatedaily maximum report only all year
001Benzidinedaily maximum report only all year
001Vinyl chloridedaily maximum report only all year
001Trichloroethylenedaily maximum report only all year
0014,4'-DDTdaily maximum report only all year
0014,4'-DDDdaily maximum report only all year
0014,4'-DDEdaily maximum report only all year
001Aldrindaily maximum report only all year
001.alpha.-BHCdaily maximum report only all year
001.beta.-BHCdaily maximum report only all year
001.gamma.-BHCdaily maximum report only all year
001Chlordane [tech mix. and metabolites]daily maximum report only all year
001Dieldrindaily maximum report only all year
001Endosulfan, totaldaily maximum report only all year
001Endrindaily maximum report only all year
001Toxaphenedaily maximum report only all year
001Heptachlordaily maximum report only all year
001Heptachlor epoxidedaily maximum report only all year
001Methoxychlordaily maximum report only all year
001Polychlorinated biphenyls [PCBs]daily maximum report only all year
001Malathiondaily maximum report only all year
001Parathiondaily maximum report only all year
001Guthiondaily maximum report only all year
001Hexachlorobenzenedaily maximum report only all year
001Picloramdaily maximum report only all year
0012,4-Dichlorophenoxyacetic aciddaily maximum report only all year
001Mirexdaily maximum report only all year
0011,2-Dibromo-3-chloropropanedaily maximum report only all year
001Flow, in conduit or thru treatment plantmonthly average report only all year
001Flow, in conduit or thru treatment plantdaily maximum report only all year
001Chlorine, total residualmonthly average <= 9 ug/L all year
001Chlorine, total residualdaily maximum <= 18 ug/L all year
001Chlorine, total residualdaily maximum report only all year
001Chlorine, total residualmonthly average <= 200 g/d all year
001Chlorine, total residualdaily maximum <= 410 g/d all year
001E. coli, colony forming units [CFU]monthly average <= 126 CFU/100mL all year
001E. coli, colony forming units [CFU]daily maximum report only all year
001E. coli, colony forming units [CFU]daily maximum <= 575 CFU/100mL all year
001Di[2-ethylhexyl] adipatedaily maximum report only all year
001Endothalldaily maximum report only all year
0014-Chloro-3-methylphenoldaily maximum report only all year
001Solids, total dissolvedmonthly average report only all year
001Solids, total dissolveddaily maximum report only all year
001Solids, total dissolveddaily maximum report only all year
001Solids, total dissolvedmonthly average report only all year
001Solids, total dissolveddaily maximum report only all year
001Hydrogen sulfidedaily maximum report only all year
001cis-1,2-Dichloroethylenedaily maximum report only all year
0011,3-Dichloropropenedaily maximum report only all year
001Ethylene dibromidedaily maximum report only all year
001Alachlordaily maximum report only all year
0012,4,5-TPdaily maximum report only all year
001Glyphosate, totaldaily maximum report only all year
001BOD, 5-day, percent removalmonthly average minimum >= 85 % all year
001Solids, suspended percent removalmonthly average minimum >= 85 % all year
001Chlorpyrifosdaily maximum report only all year
001Carbofurandaily maximum report only all year
001Xylene [mix of m+o+p]daily maximum report only all year
001Styrenedaily maximum report only all year
001Trihalomethane, tot.daily maximum report only all year
001Paraquatdaily maximum report only all year
001Permethrin, total recoverabledaily maximum report only all year
001Chloroethanedaily maximum report only all year
001TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)monthly median report only all year
001TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximum report only all year
001TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximum report only all year
001Static 7Day Chronic Pimephales Promelasmonthly median report only all year
001Static 7Day Chronic Pimephales Promelasdaily maximum report only all year
001Static 7Day Chronic Pimephales Promelasdaily maximum report only all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamonthly median report only all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiadaily maximum report only all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiadaily maximum report only all year
005Flow, in conduit or thru treatment plantmonthly average report only all year
005Flow, in conduit or thru treatment plantdaily maximum report only all year
005Chlorine, total residualmonthly average <= 9 ug/L all year
005Chlorine, total residualdaily maximum <= 18 ug/L all year
INFBOD, 5-day, 20 deg. Cmonthly average report only all year
INFBOD, 5-day, 20 deg. Cweekly average report only all year
INFSolids, total suspendedmonthly average report only all year
INFSolids, total suspendedweekly average 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