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Clark County Department of Aviation

Airports, Flying Fields, & Services, Las Vegas, Nevada. NPDES permit NV0023761, in force until Jul 31, 2029. Last 12 months: over a limit 2 times (last June 2026), 35 required values missing, 15 of 45 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (4 values), outfall 001 form Q quarterly (10 values), outfall 002 form A quarterly (4 values), outfall 002 form Q quarterly (12 values), outfall 003 form A quarterly (4 values), outfall SUM form A quarterly (4 values), and 7 more forms
Last report on file
June 2026
Oct 2024 – Sep 2025
3 values over a limit, 26 required values missing, 11 of 58 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
December 2025001Solids, total dissolved, daily maximum2000 mg/L≤ 1900 mg/L5%
June 2026003pH, minimum, daily minimum0 SU≥ 6.5 SU—

Limits in force (310)

ParameterStatisticLimitMonthsOutfall
Flow rate30-day averagereport only (MGD)all year001
Flow rate30-day averagereport only (MGD)all year001
Flow rate30-day averagereport only (MGD)all year001
Flow rate30-day averagereport only (MGD)all year001
Flow ratedaily maximumreport only (MGD)all year001
Flow ratedaily maximumreport only (MGD)all year001
Flow ratedaily maximumreport only (MGD)all year001
Flow ratedaily maximumreport only (MGD)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, inorganic totaldaily maximumreport only (mg/L)all year001
Nitrogen, inorganic totaldaily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Cyanide, total [as CN]daily maximum≤ 22 ug/Lall year001
Sulfide, total [as S]daily maximum≤ 2 ug/Lall year001
Fluoride, total [as F]daily maximum≤ 1000 ug/Lall year001
Arsenic, total recoverabledaily maximum≤ 100 ug/Lall year001
Iron, total recoverabledaily maximum≤ 1000 ug/Lall year001
Beryllium, total recoverable [as Be]daily maximum≤ 100 ug/Lall year001
Boron, total recoverabledaily maximumreport only (ug/L)all year001
Cadmium, dissolved [as Cd]daily maximum≤ 7.6 ug/Lall year001
Chromium, hexavalent [as Cr]daily maximum≤ 16 ug/Lall year001
Chromium, trivalent [as Cr]daily maximum≤ 2024 ug/Lall year001
Copper, dissolved [as Cu]daily maximum≤ 58 ug/Lall year001
Lead, dissolved [as Pb]daily maximum≤ 100 ug/Lall year001
Nickel, total recoverabledaily maximum≤ 200 ug/Lall year001
Silver total recoverabledaily maximum≤ 46 ug/Lall year001
Zinc, dissolved [as Zn]daily maximum≤ 435 ug/Lall year001
Chromium, total recoverabledaily maximum≤ 100 ug/Lall year001
Molybdenum, total recoverabledaily maximum≤ 6160 ug/Lall year001
Selenium, dissolved [as Se]daily maximumreport only (ug/L)all year001
Tributyltindaily maximum≤ .46 ug/Lall year001
Manganese, total recoverabledaily maximum≤ 200 ug/Lall year001
Dichlorobromomethanedaily maximumreport only (ug/L)all year001
Carbon tetrachloridedaily maximumreport only (ug/L)all year001
1,2-Dichloroethanedaily maximumreport only (ug/L)all year001
Bromoformdaily maximumreport only (ug/L)all year001
Dibromochloromethanedaily maximumreport only (ug/L)all year001
Chloroformdaily maximumreport only (ug/L)all year001
Chloroformdaily maximumreport only (ug/L)all year001
Toluenedaily maximumreport only (ug/L)all year001
Benzenedaily maximumreport only (ug/L)all year001
Acroleindaily maximum≤ 3 ug/Lall year001
Chlorobenzenedaily maximumreport only (ug/L)all year001
.beta.-Endosulfandaily maximum≤ .22 ug/Lall year001
.alpha.-Endosulfandaily maximum≤ .22 ug/Lall year001
Ethylbenzenedaily maximumreport only (ug/L)all year001
Methyl bromide [Bromomethane]daily maximumreport only (ug/L)all year001
Methyl chloride [Chloromethane]daily maximumreport only (ug/L)all year001
Methylene chloridedaily maximumreport only (ug/L)all year001
Tetrachloroethylenedaily maximumreport only (ug/L)all year001
Trichlorofluoromethanedaily maximumreport only (ug/L)all year001
1,1-Dichloroethanedaily maximumreport only (ug/L)all year001
1,1-Dichloroethylenedaily maximumreport only (ug/L)all year001
1,1,1-Trichloroethanedaily maximumreport only (ug/L)all year001
1,1,2-Trichloroethanedaily maximumreport only (ug/L)all year001
1,1,2,2-Tetrachloroethanedaily maximumreport only (ug/L)all year001
1,2-Dichlorobenzenedaily maximumreport only (ug/L)all year001
1,2-Dichloropropanedaily maximumreport only (ug/L)all year001
trans-1,2-Dichloroethylenedaily maximumreport only (ug/L)all year001
1,3-Dichlorobenzenedaily maximumreport only (ug/L)all year001
1,4-Dichlorobenzenedaily maximumreport only (ug/L)all year001
2-Chloroethyl vinyl ether, [mixed]daily maximumreport only (ug/L)all year001
trans-1,3-Dichloropropenedaily maximumreport only (ug/L)all year001
cis-1,3-Dichloropropenedaily maximumreport only (ug/L)all year001
Chlorpyrifosdaily maximum≤ .08 ug/Lall year001
Pentachlorophenoldaily maximumreport only (ug/L)all year001
Vinyl chloridedaily maximumreport only (ug/L)all year001
Trichloroethylenedaily maximumreport only (ug/L)all year001
4,4'-DDTdaily maximum≤ 1.1 ug/Lall year001
Aldrindaily maximum≤ 3 ug/Lall year001
Chlordane [tech mix. and metabolites]daily maximum≤ 2.4 ug/Lall year001
Dieldrindaily maximum≤ .24 ug/Lall year001
Endrindaily maximum≤ .09 ug/Lall year001
Toxaphenedaily maximum≤ .73 ug/Lall year001
Heptachlordaily maximum≤ .52 ug/Lall year001
Heptachlor epoxidedaily maximum≤ .52 ug/Lall year001
Methoxychlordaily maximum≤ .03 ug/Lall year001
Polychlorinated biphenyls [PCBs]daily maximum≤ .01 ug/Lall year001
Malathiondaily maximum≤ .1 ug/Lall year001
Parathiondaily maximum≤ .07 ug/Lall year001
Demetondaily maximum≤ .1 ug/Lall year001
Diazinondaily maximum≤ .17 ug/Lall year001
Mirexdaily maximum≤ .001 ug/Lall year001
Lindanedaily maximum≤ .95 ug/Lall year001
Nonylphenoldaily maximum≤ 28 ug/Lall year001
pH, maximumdaily maximum≤ 9 SUall year001
pH, maximumdaily maximum≤ 9 SUall year001
pH, minimumdaily minimum≥ 6.5 SUall year001
pH, minimumdaily minimum≥ 6.5 SUall year001
Solids, total dissolveddaily maximum≤ 1900 mg/Lall year001
Solids, total dissolveddaily maximum≤ 1900 mg/Lall year001
Mercury, dissolved [as Hg]daily maximum≤ 1.4 ug/Lall year001
Hydrocarbons, total petroleumdaily maximum≤ 1 mg/Lall year001
Hydrocarbons, total petroleumdaily maximum≤ 1 mg/Lall year001
Azinphos-methyldaily maximum≤ .01 ug/Lall year001
Chloroethanedaily maximumreport only (ug/L)all year001
Flow rate30-day averagereport only (MGD)all year002
Flow rate30-day averagereport only (MGD)all year002
Flow rate30-day averagereport only (MGD)all year002
Flow rate30-day averagereport only (MGD)all year002
Flow ratedaily maximumreport only (MGD)all year002
Flow ratedaily maximumreport only (MGD)all year002
Flow ratedaily maximumreport only (MGD)all year002
Flow ratedaily maximumreport only (MGD)all year002
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year002
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year002
Nitrogen, inorganic totaldaily maximum≤ 20 mg/Lall year002
Nitrogen, inorganic totaldaily maximum≤ 20 mg/Lall year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]daily maximumreport only (lb/d)all year002
Phosphorus, total [as P]daily maximumreport only (lb/d)all year002
Cyanide, total [as CN]daily maximum≤ 22 ug/Lall year002
Sulfide, total [as S]daily maximum≤ 2 ug/Lall year002
Fluoride, total [as F]daily maximum≤ 1000 ug/Lall year002
Arsenic, total recoverabledaily maximum≤ 100 ug/Lall year002
Iron, total recoverabledaily maximum≤ 1000 ug/Lall year002
Beryllium, total recoverable [as Be]daily maximum≤ 100 ug/Lall year002
Boron, total recoverabledaily maximum≤ 750 ug/Lall year002
Boron, total recoverabledaily maximum≤ 750 ug/Lall year002
Boron, total recoverabledaily maximumreport only (ug/L)all year002
Cadmium, dissolved [as Cd]daily maximum≤ 7.6 ug/Lall year002
Chromium, hexavalent [as Cr]daily maximum≤ 16 ug/Lall year002
Chromium, trivalent [as Cr]daily maximum≤ 2023 ug/Lall year002
Copper, dissolved [as Cu]daily maximum≤ 58 ug/Lall year002
Lead, dissolved [as Pb]daily maximum≤ 321 ug/Lall year002
Nickel, total recoverabledaily maximum≤ 200 ug/Lall year002
Silver total recoverabledaily maximum≤ 46 ug/Lall year002
Zinc, dissolved [as Zn]daily maximum≤ 435 ug/Lall year002
Chromium, total recoverabledaily maximum≤ 100 ug/Lall year002
Molybdenum, total recoverabledaily maximum≤ 6160 ug/Lall year002
Selenium, dissolved [as Se]daily maximum≤ 6.3 ug/Lall year002
Selenium, dissolved [as Se]daily maximum≤ 6.3 ug/Lall year002
Selenium, dissolved [as Se]daily maximumreport only (ug/L)all year002
Tributyltindaily maximum≤ .46 ug/Lall year002
Manganese, total recoverabledaily maximum≤ 200 ug/Lall year002
Dichlorobromomethanedaily maximumreport only (ug/L)all year002
Carbon tetrachloridedaily maximumreport only (ug/L)all year002
1,2-Dichloroethanedaily maximumreport only (ug/L)all year002
Bromoformdaily maximumreport only (ug/L)all year002
Dibromochloromethanedaily maximumreport only (ug/L)all year002
Chloroformdaily maximumreport only (ug/L)all year002
Chloroformdaily maximumreport only (ug/L)all year002
Toluenedaily maximumreport only (ug/L)all year002
Benzenedaily maximumreport only (ug/L)all year002
Acroleindaily maximum≤ 3 ug/Lall year002
Chlorobenzenedaily maximumreport only (ug/L)all year002
.beta.-Endosulfandaily maximum≤ .22 ug/Lall year002
.alpha.-Endosulfandaily maximum≤ .22 ug/Lall year002
Ethylbenzenedaily maximumreport only (ug/L)all year002
Methyl bromide [Bromomethane]daily maximumreport only (ug/L)all year002
Methyl chloride [Chloromethane]daily maximumreport only (ug/L)all year002
Methylene chloridedaily maximumreport only (ug/L)all year002
Tetrachloroethylenedaily maximumreport only (ug/L)all year002
Trichlorofluoromethanedaily maximumreport only (ug/L)all year002
1,1-Dichloroethanedaily maximumreport only (ug/L)all year002
1,1-Dichloroethylenedaily maximumreport only (ug/L)all year002
1,1,1-Trichloroethanedaily maximumreport only (ug/L)all year002
1,1,2-Trichloroethanedaily maximumreport only (ug/L)all year002
1,1,2,2-Tetrachloroethanedaily maximumreport only (ug/L)all year002
1,2-Dichlorobenzenedaily maximumreport only (ug/L)all year002
1,2-Dichloropropanedaily maximumreport only (ug/L)all year002
trans-1,2-Dichloroethylenedaily maximumreport only (ug/L)all year002
1,3-Dichlorobenzenedaily maximumreport only (ug/L)all year002
1,4-Dichlorobenzenedaily maximumreport only (ug/L)all year002
2-Chloroethyl vinyl ether, [mixed]daily maximumreport only (ug/L)all year002
trans-1,3-Dichloropropenedaily maximumreport only (ug/L)all year002
cis-1,3-Dichloropropenedaily maximumreport only (ug/L)all year002
Chlorpyrifosdaily maximum≤ .08 ug/Lall year002
Pentachlorophenoldaily maximumreport only (ug/L)all year002
Vinyl chloridedaily maximumreport only (ug/L)all year002
Trichloroethylenedaily maximumreport only (ug/L)all year002
4,4'-DDTdaily maximum≤ 1.1 ug/Lall year002
Aldrindaily maximum≤ 3 ug/Lall year002
Chlordane [tech mix. and metabolites]daily maximum≤ 2.4 ug/Lall year002
Dieldrindaily maximum≤ .24 ug/Lall year002
Endrindaily maximum≤ .09 ug/Lall year002
Toxaphenedaily maximum≤ .73 ug/Lall year002
Heptachlordaily maximum≤ .52 ug/Lall year002
Heptachlor epoxidedaily maximum≤ .52 ug/Lall year002
Methoxychlordaily maximum≤ .03 ug/Lall year002
Polychlorinated biphenyls [PCBs]daily maximum≤ .01 ug/Lall year002
Malathiondaily maximum≤ .1 ug/Lall year002
Parathiondaily maximum≤ .07 ug/Lall year002
Demetondaily maximum≤ .1 ug/Lall year002
Diazinondaily maximum≤ .17 ug/Lall year002
Mirexdaily maximum≤ .001 ug/Lall year002
Lindanedaily maximum≤ .95 ug/Lall year002
Nonylphenoldaily maximum≤ 28 ug/Lall year002
pH, maximumdaily maximum≤ 9 SUall year002
pH, minimumdaily minimum≥ 6.5 SUall year002
pH, minimumdaily minimum≥ 6.5 SUall year002
Solids, total dissolveddaily maximumreport only (mg/L)all year002
Solids, total dissolveddaily maximumreport only (mg/L)all year002
Mercury, dissolved [as Hg]daily maximum≤ 1.4 ug/Lall year002
Hydrocarbons, total petroleumdaily maximum≤ 1 mg/Lall year002
Hydrocarbons, total petroleumdaily maximum≤ 1 mg/Lall year002
Azinphos-methyldaily maximum≤ .01 ug/Lall year002
Chloroethanedaily maximumreport only (ug/L)all year002
Flow rate30-day averagereport only (MGD)all year003
Flow rate30-day averagereport only (MGD)all year003
Flow rate30-day averagereport only (MGD)all year003
Flow rate30-day averagereport only (MGD)all year003
Flow rate30-day averagereport only (MGD)all year003
Flow rate30-day averagereport only (MGD)all year003
Flow ratedaily maximumreport only (MGD)all year003
Flow ratedaily maximumreport only (MGD)all year003
Flow ratedaily maximum≤ .5 MGDall year003
Flow ratedaily maximum≤ .5 MGDall year003
Flow ratedaily maximum≤ .5 MGDall year003
Flow ratedaily maximum≤ .5 MGDall year003
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year003
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year003
Nitrogen, inorganic totaldaily maximumreport only (mg/L)all year003
Phosphorous, total organic [as P]daily maximumreport only (mg/L)all year003
Phosphorous, total organic [as P]daily maximumreport only (lb/d)all year003
Cyanide, total [as CN]daily maximum≤ 22 ug/Lall year003
Sulfide, total [as S]daily maximum≤ 2 ug/Lall year003
Fluoride, total [as F]daily maximum≤ 1000 ug/Lall year003
Arsenic, total recoverabledaily maximum≤ 100 ug/Lall year003
Iron, total recoverabledaily maximum≤ 1000 ug/Lall year003
Beryllium, total recoverable [as Be]daily maximum≤ 100 ug/Lall year003
Boron, total recoverabledaily maximumreport only (ug/L)all year003
Boron, total recoverabledaily maximum≤ 750 ug/Lall year003
Cadmium, dissolved [as Cd]daily maximum≤ 7.6 ug/Lall year003
Chromium, hexavalent [as Cr]daily maximum≤ 16 ug/Lall year003
Chromium, trivalent [as Cr]daily maximum≤ 2023 ug/Lall year003
Copper, dissolved [as Cu]daily maximum≤ 58 ug/Lall year003
Lead, dissolved [as Pb]daily maximum≤ 321 ug/Lall year003
Nickel, total recoverabledaily maximum≤ 200 ug/Lall year003
Silver total recoverabledaily maximum≤ 46 ug/Lall year003
Zinc, dissolved [as Zn]daily maximum≤ 435 ug/Lall year003
Chromium, total recoverabledaily maximum≤ 100 ug/Lall year003
Molybdenum, total recoverabledaily maximum≤ 6160 ug/Lall year003
Selenium, dissolved [as Se]daily maximumreport only (ug/L)all year003
Selenium, dissolved [as Se]daily maximum≤ 6.3 ug/Lall year003
Tributyltindaily maximum≤ .46 ug/Lall year003
Manganese, total recoverabledaily maximum≤ 200 ug/Lall year003
Dichlorobromomethanedaily maximumreport only (ug/L)all year003
Carbon tetrachloridedaily maximumreport only (ug/L)all year003
1,2-Dichloroethanedaily maximumreport only (ug/L)all year003
Bromoformdaily maximumreport only (ug/L)all year003
Dibromochloromethanedaily maximumreport only (ug/L)all year003
Chloroformdaily maximumreport only (mg/L)all year003
Chloroformdaily maximumreport only (ug/L)all year003
Toluenedaily maximumreport only (ug/L)all year003
Benzenedaily maximumreport only (ug/L)all year003
Acroleindaily maximum≤ 3 ug/Lall year003
Chlorobenzenedaily maximumreport only (ug/L)all year003
.beta.-Endosulfandaily maximum≤ .22 ug/Lall year003
.alpha.-Endosulfandaily maximum≤ .22 ug/Lall year003
Ethylbenzenedaily maximumreport only (ug/L)all year003
Methyl bromide [Bromomethane]daily maximumreport only (ug/L)all year003
Methyl chloride [Chloromethane]daily maximumreport only (ug/L)all year003
Methylene chloridedaily maximumreport only (ug/L)all year003
Tetrachloroethylenedaily maximumreport only (ug/L)all year003
Trichlorofluoromethanedaily maximumreport only (ug/L)all year003
1,1-Dichloroethanedaily maximumreport only (ug/L)all year003
1,1-Dichloroethylenedaily maximumreport only (ug/L)all year003
1,1,1-Trichloroethanedaily maximumreport only (ug/L)all year003
1,1,2-Trichloroethanedaily maximumreport only (ug/L)all year003
1,1,2,2-Tetrachloroethanedaily maximumreport only (ug/L)all year003
1,2-Dichlorobenzenedaily maximumreport only (ug/L)all year003
1,2-Dichloropropanedaily maximumreport only (ug/L)all year003
trans-1,2-Dichloroethylenedaily maximumreport only (ug/L)all year003
1,3-Dichlorobenzenedaily maximumreport only (ug/L)all year003
1,4-Dichlorobenzenedaily maximumreport only (ug/L)all year003
2-Chloroethyl vinyl ether, [mixed]daily maximumreport only (ug/L)all year003
trans-1,3-Dichloropropenedaily maximumreport only (ug/L)all year003
cis-1,3-Dichloropropenedaily maximumreport only (ug/L)all year003
Chlorpyrifosdaily maximum≤ .08 ug/Lall year003
Pentachlorophenoldaily maximumreport only (ug/L)all year003
Vinyl chloridedaily maximumreport only (ug/L)all year003
Trichloroethylenedaily maximumreport only (ug/L)all year003
4,4'-DDTdaily maximum≤ 1.1 ug/Lall year003
Aldrindaily maximum≤ 3 ug/Lall year003
Chlordane [tech mix. and metabolites]daily maximum≤ 2.4 ug/Lall year003
Dieldrindaily maximum≤ .24 ug/Lall year003
Endrindaily maximum≤ .09 ug/Lall year003
Toxaphenedaily maximum≤ .73 ug/Lall year003
Heptachlordaily maximum≤ .52 ug/Lall year003
Heptachlor epoxidedaily maximum≤ .52 ug/Lall year003
Methoxychlordaily maximum≤ .03 ug/Lall year003
Polychlorinated biphenyls [PCBs]daily maximum≤ .01 ug/Lall year003
Malathiondaily maximum≤ .1 ug/Lall year003
Parathiondaily maximum≤ .07 ug/Lall year003
Demetondaily maximum≤ .1 ug/Lall year003
Diazinondaily maximum≤ .17 ug/Lall year003
Mirexdaily maximum≤ .001 ug/Lall year003
Lindanedaily maximum≤ .95 ug/Lall year003
Nonylphenoldaily maximum≤ 28 ug/Lall year003
pH, maximumdaily maximum≤ 9 SUall year003
pH, minimumdaily minimum≥ 6.5 SUall year003
Solids, total dissolveddaily maximum≤ 1900 mg/Lall year003
Mercury, dissolved [as Hg]daily maximum≤ 1.4 ug/Lall year003
Hydrocarbons, total petroleumdaily maximum≤ 1 mg/Lall year003
Azinphos-methyldaily maximum≤ .01 ug/Lall year003
Chloroethanedaily maximumreport only (ug/L)all year003
Flow rate30-day averagereport only (MGD)all yearSUM
Flow rate30-day averagereport only (MGD)all yearSUM
Flow ratedaily maximum≤ .5 MGDall yearSUM
Flow ratedaily maximum≤ .5 MGDall yearSUM

How strict are these limits?

Cited limits by parameter: Nevada's rules and the federal ones.

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