USGS - science for a changing world

Branch of Quality Systems


usgs >  bqs>   ltmdl


Blue Flower

Long Term-Method Detection Levels (LT-MDL)
for the US Geological Survey, National Water Quality Laboratory



  DATA CHARTS and DATA TABLES
Arsenic Speciation Carbon Colorimetry EDB/DBCP Gasoline Oxygenates & BTEX ICP (filtered)
ICP (whole water) ICP-MS (filtered) ICP-MS (whole water) Ion Chromatography Ion Selective Electrode Mercury
Nutrients Pesticides Pesticides (Sch 2033) Pharmaceuticals Physical Properties Polar Pesticides
Radon Semivolatiles UV Absorbance Volatiles Waste Water  
         

Summary of LT-MDLs Determined for FY2010

Analyte Name Sched or LC TestID FY08-09
LTMDL		 FY09-10
LTMDL
1,1,1,2-Tetrachloroethane 2021 77562GCM66 0.02 0.020
1,1,1-Trichloroethane 2021 34506GCM66 0.01 0.015
1,1,2,2-Tetrachloroethane 2021 34516GCM66 0.05 0.07
1,1,2-Trichloroethane 2021 34511GCM66 0.03 0.023
1,1,2-Trichlorotrifluoroethane 2021 77652GCM66 0.02 0.017
1,1-Dichloroethane 2021 34496GCM66 0.02 0.022
1,1-Dichloroethylene 2021 34501GCM66 0.01 0.011
1,1-Dichloropropene 2021 77168GCM66 0.02 0.015
1,2,3,4-Tetramethylbenzene 2021 49999GCM66 0.04 no change
1,2,3,5-Tetramethylbenzene 2021 50000GCM66 0.04 no change
1,2,3-Trichlorobenzene 2021 77613GCM66 0.03 no change
1,2,3-Trichloropropane 2021 77443GCM66 0.06 no change
1,2,3-Trimethylbenzene 2021 77221GCM66 0.04 0.03
1,2,4-Trichlorobenzene 1383 34551GCM57 0.1 0.13
1,2,4-Trichlorobenzene 2021 34551GCM66 0.02 0.04
1,2,4-Trimethylbenzene 2021 77222GCM66 0.02 0.016
1,2-Dibromo-3-chloropropane 1306 82625GC108 0.03 no change
1,2-Dibromo-3-chloropropane 2021 82625GCM66 0.5 0.17
1,2-Dibromoethane 2021 77651GCM66 0.02 0.025
1,2-Dibromoethane 1306 77651GC108 0.01 0.018
1,2-Dichlorobenzene 1383 34536GCM57 0.1 0.10
1,2-Dichlorobenzene 2021 34536GCM66 0.01 0.014
1,2-Dichloroethane 2021 32103GCM66 0.03 0.04
1,2-Dichloropropane 2021 34541GCM66 0.01 0.013
1,2-Diphenylhydrazine 1383 82626GCM55 0.15 0.13
1,3,5-Trimethylbenzene 2021 77226GCM66 0.02 0.016
1,3-Dichlorobenzene 1383 34566GCM57 0.1 0.11
1,3-Dichlorobenzene 2021 34566GCM66 0.01 0.012
1,3-Dichloropropane 2021 77173GCM66 0.03 no change
1,4-Dichlorobenzene 1433 34572GCM37 0.02 0.010
1,4-Dichlorobenzene 1383 34571GCM57 0.1 0.11
1,4-Dichlorobenzene 2021 34571GCM66 0.01 0.013
1,7-dimethylxanthine 2080 6203000021 0.06 0.05
1-Methylnaphthalene 1433 62054GCM37 0.02 0.011
1-Naphthol 2001 49295GCM39 0.02 no change
2,2-Dichloropropane 2021 77170GCM66 0.03 no change
2,4,6-Trichlorophenol 1383 34621GCM56 0.3 0.17
2,4-D 2060 39732LCM29 0.03 hold
2,4-D methyl ester 2060 50470LCM29 0.1 hold
2,4-DB 2060 38746LCM29 0.01 hold
2,4-Dichlorophenol 1383 34601GCM56 0.2 0.18
2,4-Dimethylphenol 1383 34606GCM56 0.4 no change
2,4-Dinitrophenol 1383 34616GCM56 0.7 no change
2,4-Dinitrotoluene 1383 34611GCM57 0.3 0.28
2,6-Diethylaniline 2001 82660GCM35 0.003 no change
2,6-Dimethylnaphthalene 1433 62055GCM37 0.06 0.03
2,6-Dinitrotoluene 1383 34626GCM57 0.22 0.2
2-Butanone 2021 81595GCM66 0.8 no change
2-Chloro-2,6-diethylacetanilide 2001 61618GCM39 0.005 0.003
2-Chloro-4-isopropylamino-6amino-s-triazine 2060 04040LCM29 0.03 hold
2-Chloro-6-ethylamino-4-amino-s-triazine 2060 04038LCM29 0.03 hold
2-Chloronaphthalene 1383 34581GCM57 0.1 0.08
2-Chlorophenol 1383 34586GCM56 0.21 0.13
2-Chlorotoluene 2021 77275GCM66 0.01 0.014
2-Ethyl-6-methylaniline 2001 61620GCM39 0.0049 no change
2-Hexanone 2021 77103GCM66 0.3 0.23
2-Hydroxyatrazine 2060 50355LCM29 0.03 hold
2-Methylnaphthalene 1433 62056GCM37 0.02 0.018
2-Nitrophenol 1383 34591GCM56 0.2 0.20
3-(4-Chlorophenyl)-1-methyl urea 2060 61692LCM29 0.03 hold
3,3-Dichlorobenzidine 1383 34631GCM55 0.2 0.21
3,4-Dichloroaniline 2001 61625GCM39 0.002 no change
3,5-Dichloroaniline 2001 61627GCM39 0.002 0.0015
3-beta-Coprostanol 1433 62057GCM37 1 0.9
3-Chloropropene 2021 78109GCM66 0.04 no change
3-Hydroxycarbofuran 2060 49308LCM29 0.02 hold
3-Methyl-1H-indole (Skatol) 1433 62058GCM37 0.02 0.018
3-tert-Butyl-4-hydroxyanisole (BHA) 1433 62059GCM37 0.3 100
4,6-Dinitro-2-methylphenol 1383 34657GCM56 0.38 no change
4-Bromophenylphenylether 1383 34636GCM57 0.18 0.12
4-Chloro-2-methylphenol 2001 61633GCM39 0.0025 0.0016
4-Chloro-3-methylphenol 1383 34452GCM56 0.27 no change
4-Chlorophenyl phenyl ether 1383 34641GCM57 0.17 no change
4-Chlorotoluene 2021 77277GCM66 0.01 0.021
4-Cumylphenol 1433 62060GCM37 0.05 0.03
4-Isopropyl-1-methylbenzene 2021 77356GCM66 0.03 no change
4-Methyl-2-pentanone 2021 78133GCM66 0.2 0.16
4-Nitrophenol 1383 34646GCM56 0.26 no change
4-n-Octylphenol 1433 62061GCM37 0.08 no change
4-tert-Octylphenol 1433 62062GCM37 0.7 0.07
5-Methyl-1H-benzotriazole 1433 62063GCM37 1 0.6
Acenaphthene 1383 34205GCM57 0.14 no change
Acenaphthylene 1383 34200GCM57 0.15 no change
Acetaminophen 2080 6200000021 0.04 0.06
Acetochlor 2001 49260GCM33 0.005 no change
Acetone 4025 81552GCM59 0.9 0.6
Acetone 2021 81552GCM66 2 1.7
Acetophenone 1433 62064GCM37 0.2 no change
Acetyl-hexamethyl-tetrahydro-naphthalene ( AHTN) 1433 62065GCM37 0.5 0.014
Acid neutralized  Capacity TOT LAB CACO3 70 90410TT040 4 4.5
Acifluorfen 2060 49315LCM29 0.02 hold
Acrylonitrile 2021 34215GCM66 0.2 0.4
Alachlor 2001 46342GCM35 0.004 no change
Aldicarb 2060 49312LCM29 0.06 hold
Aldicarb sulfone 2060 49313LCM29 0.04 hold
Alkaline Persulfate-Phosphorous, FCA 2758 00666CL062 0.01 0.012
Alkalinity, filtered 2109 29801TT040 4 3.8
alpha-HCH 2001 34253GCM35 0.004 0.0020
Aluminum, Filtered 1784 01106PLM43 2 1.7
Aluminum, Unfiltered 2372 01105PLM48 3 2.8
Ammonia, Kone 3116 60800048 0.01 0.008
Anthracene 1433 34221GCM37 0.02 0.014
Anthracene 1383 34220GCM57 0.19 no change
Anthraquinone 1433 62066GCM37 0.08 no change
Antimony, Filtered 1785 01095PLM43 0.02 0.027
Antimony, Unfiltered 2373 01097PLM48 0.2 0.18
Arsenate [As(V)], Filtered, ug/L, ICPMS 2735 62453PLM35 0.4 no change
Arsenic, Filtered, collision 3122 01000PLM10 0.03 0.022
Arsenic, Unfiltered, collision 3123 01002PLM11 0.1 0.09
Arsenite [As(III)], Filtered, ug/L, ICPMS 2734 62452PLM35 0.4 no change
Atrazine 2001 39632GCM35 0.004 no change
Atrazine 2060 39632LCM29 0.02 hold
Azinphos-methyl 2001 82686GCM35 0.06 no change
Barium, DIS 641 01005PLA11 0.3 no change
Barium, Filtered 1786 01005PLM43 0.2 0.07
Barium, Unfiltered 2374 01007PLM47 0.2 0.3
Barium, Unfiltered, ICP 2352 01007PLA15 0.3 no change
Bendiocarb 2060 50299LCM29 0.02 hold
Benfluralin 2001 82673GCM35 0.007 no change
Benomyl 2060 50300LCM29 0.03 hold
Bensulfuron-methyl 2060 61693LCM29 0.03 hold
Bentazon 2060 38711LCM29 0.03 hold
Benz[a]anthracene 1383 34526GCM57 0.13 no change
Benz[a]pyrene 1433 34248GCM37 0.04 0.025
Benzene 4025 34030GCM59 0.04 no change
Benzene 2021 34030GCM66 0.008 0.013
Benzo[a]pyrene 1383 34247GCM57 0.16 no change
Benzo[b]fluoranthene 1383 34230GCM57 0.2 0.15
Benzo[ghi]perylene 1383 34521GCM57 0.2 0.19
Benzo[k]fluoranthene 1383 34242GCM57 0.2 0.15
Benzophenone 1433 62067GCM37 0.06 0.04
Beryllium, DIS 655 01010PLA11 0.1 no change
Beryllium, Filtered 1787 01010PLM43 0.01 0.006
Beryllium, Unfiltered 2375 01012PLM47 0.01 0.02
Beryllium, Unfiltered, ICP 2353 01012PLA15 0.1 no change
beta-Sitosterol 1433 62068GCM37 2 no change
beta-Stigmastanol 1433 62086GCM37 1 1.3
bis Phenol A 1433 62069GCM37 0.2 100
bis(2-Chloroethoxy)methane 1383 34278GCM57 0.1 0.12
bis(2-Chloroethyl)ether 1383 34273GCM57 0.15 no change
bis(2-chloroisopropyl) ether 1383 34283GCM57 0.19 0.07
bis(2-Ethylhexyl) phthalate 1383 39100GCM57 2 1
Boron, DIS 2110 01020PLA13 1 no change
Boron, Filtered 2504 01020PLM40 2 1.4
Boron, Unfiltered 2501 01022PLM47 7 no change
Boron, Unfiltered, ICP 2354 01022PLA15 2 2.4
Bromacil 1433 04029GCM37 0.5 0.18
Bromacil 2060 04029LCM29 0.03 hold
Bromide, Filtered 3166 71870IC027 0.01 hold
Bromide, low-level, Filtered 1258 71870IC024 0.01 hold
Bromobenzene 2021 81555GCM66 0.01 0.011
Bromochloromethane 2021 77297GCM66 0.03 no change
Bromodichloromethane 2021 32101GCM66 0.02 0.017
Bromoethene 2021 50002GCM66 0.06 no change
Bromoform 1433 34288GCM37 0.05 no change
Bromoform 2021 32104GCM66 0.05 no change
Bromomethane 2021 34413GCM66 0.2 0.1
Bromoxynil 2060 49311LCM29 0.06 hold
Butylate 2001 04028GCM35 0.001 0.002
Butylbenzene 2021 77342GCM66 0.07 0.04
Butylbenzyl phthalate 1383 34292GCM57 0.9 no change
Cadmium, DIS 673 01025PLA11 0.3 no change
Cadmium, Filtered 1788 01025PLM43 0.01 no change
Cadmium, Unfiltered 2376 01027PLM47 0.03 0.02
Cadmium, Unfiltered, ICP 2355 01027PLA15 0.5 0.3
Caffeine 1433 50305GCM37 0.05 0.03
Caffeine 2080 5030500021 0.1 0.03
Caffeine 2060 50305LCM29 0.04 hold
Calcium, DIS 659 00915PLA11 0.01 0.022
Calcium, Unfiltered, ICP 2356 00916PLA15 0.02 no change
Camphor 1433 62070GCM37 0.03 0.022
Carbamazepine 2080 6279300021 0.02 0.03
Carbaryl 1433 82680GCM37 0.5 0.19
Carbaryl 2001 82680GCM35 0.1 0.03
Carbaryl 2060 49310LCM29 0.02 hold
Carbazole 1433 62071GCM37 0.02 0.015
Carbofuran 2001 82674GCM35 0.03 0.030
Carbofuran 2060 49309LCM29 0.02 hold
Carbon disulfide 2021 77041GCM66 0.03 no change
Carbon, Inorganic, Particulate (PIC) 2608 0068800127 0.02 0.03
Carbon, Organic, Total (TOC) 114   0.3 no change
Chloramben methyl ester 2060 61188LCM29 0.05 hold
Chloride, low-level, Filtered 1259 00940IC024 0.01 0.011
Chloride, Filtered 1571 00940IC022 0.06 no change
Chlorimuron-ethyl 2060 50306LCM29 0.04 hold
Chlorobenzene 2021 34301GCM66 0.01 0.008
Chloroethane 2021 34311GCM66 0.05 0.03
Chloroform 2021 32106GCM66 0.02 0.015
Chloromethane 2021 34418GCM66 0.07 no change
Chlorpyrifos 1433 38933GCM37 0.06 0.08
Chlorpyrifos 2001 38933GCM35 0.005 no change
Chlorpyrifos oxygen analog 2001 61636GCM39 0.03 no change
Cholesterol 1433 62072GCM37 1 no change
Chromium, DIS 722 01030PLA11 0.6 no change
Chromium, Filtered, collision 3126 01030PLM10 0.06 no change
Chromium, Unfiltered, collision 3127 01034PLM11 0.2 0.21
Chromium, Unfiltered, ICP 2357 01034PLA15 0.5 0.3
Chrysene 1383 34320GCM57 0.16 no change
cis-1,2-Dichloroethylene 2021 77093GCM66 0.01 0.011
cis-1,3-Dichloropropene 2021 34704GCM66 0.05 no change
cis-Permethrin 2001 82687GCM35 0.007 no change
Clopyralid 2060 49305LCM29 0.03 hold
Cobalt, DIS 644 01035PLA11 0.7 0.8
Cobalt,Unfiltered, collision 3125 01037PLM11 0.05 0.02
Cobalt, Unfiltered, ICP 2391 01037PLA15 0.9 0.7
Codeine 2080 6200300021 0.02 0.023
Colbalt, Filtered, collision 3124 01035PLM10 0.01 0.005
Copper, DIS 657 01040PLA11 1 1.4
Copper, Filtered, collision 3128 01040PLM10 0.5 no change
Copper, Unfiltered, collision 3129 01042PLM11 2 0.7
Copper, Unfiltered, ICP 2358 01042PLA15 2 1.9
Cotinine 1433 62005GCM37 0.2 0.3
Cotinine 2080 6200500021 0.01 0.019
Cyanazine 2001 04041GCM35 0.02 0.011
Cycloate 2060 04031LCM29 0.02 hold
Cyfluthrin 2001 61585GCM39 0.008 no change
Cypermethrin 2001 61586GCM39 0.01 no change
Dacthal 2001 82682GCM35 0.003 no change
Dacthal monoacid 2060 49304LCM29 0.02 hold
Deethylatrazine 2001 04040GCM35 0.007 no change
Dehydronifedipine 2080 6200400021 0.04 no change
Diazinon 1433 39572GCM37 0.04 0.08
Diazinon 2001 39572GCM35 0.003 no change
Dibenz[a,h]anthracene 1383 34556GCM57 0.2 0.21
Dibromochloromethane 2021 32105GCM66 0.06 no change
Dibromomethane 2021 30217GCM66 0.02 0.025
Dicamba 2060 38442LCM29 0.02 hold
Dichlorodifluoromethane 2021 34668GCM66 0.05 no change
Dichloromethane 2021 34423GCM66 0.02 0.019
Dichlorprop 2060 49302LCM29 0.02 hold
Dichlorvos 2001 38775GCM39 0.01 no change
Dicrotophos 2001 38454GCM39 0.04 no change
Dieldrin 2001 39381GCM35 0.004 no change
Diethoxyoctylphenol 1433 61705GCM37 0.5 0.26
Diethyl ether 2021 81576GCM66 0.06 0.04
Diethyl phthalate 1383 34336GCM57 0.31 no change
Diisopropyl ether 4025 81577GCM59 0.02 0.022
Diisopropyl ether 2021 81577GCM66 0.03 no change
Diltiazem 2080 6200800021 0.04 0.03
Dimethoate 2001 82662GCM40 0.003 no change
Dimethyl phthalate 1383 34341GCM57 0.2 0.18
Dimethylarsenate, Filtered, ug/L, ICPMS 2737 62455PLM35 0.3 DNU
Di-n-butyl phthalate 1383 39110GCM57 0.5 1
Di-n-octyl phthalate 1383 34596GCM57 0.3 no change
Dinoseb 2060 49301LCM29 0.02 hold
Diphenamid 2060 04033LCM29 0.02 hold
Diphenhydramine 2080 6279600021 0.02 0.018
Disulfoton  2001 82677GCM35 0.02 no change
Disulfoton sulfone 2001 61640GCM39 0.0068 0.007
Diuron 2060 49300LCM29 0.02 hold
d-Limonene 1433 62073GCM37 0.07 0.04
Endosufan I 2001 34362GCM39 0.003 no change
Endosulfan sulfate 2001 61590GCM39 0.011 0.007
EPTC 2001 82668GCM35 0.001 no change
Ethalfluralin 2001 82663GCM35 0.005 0.003
Ethion 2001 82346GCM40 0.006 0.004
Ethoprop 2001 82672GCM35 0.008 no change
Ethyl methacrylate 2021 73570GCM66 0.07 no change
Ethyl tert-butyl ether 4025 50004GCM59 0.02 0.023
Ethyl tert-butyl ether 2021 50004GCM66 0.02 0.016
Ethylbenzene 4025 34371GCM59 0.01 0.016
Ethylbenzene 2021 34371GCM66 0.02 0.018
Fenamiphos 2001 61591GCM39 0.015 no change
Fenamiphos sulfone 2001 61645GCM39 0.027 no change
Fenamiphos sulfoxide 2001 61646GCM39 0.04 no change
Fenuron 2060 49297LCM29 0.03 hold
Fipronil 2001 62166GCM31 0.02 0.009
Fipronil sulfide 2001 62167GCM31 0.006 no change
Fipronil sulfone 2001 62168GCM31 0.012 no change
Flumetsulam 2060 61694LCM29 0.03 hold
Fluometuron 2060 38811LCM29 0.02 hold
Fluoranthene 1433 34377GCM37 0.02 0.012
Fluoranthene 1383 34376GCM57 0.15 no change
Fluorene 1383 34381GCM57 0.17 0.14
Fluoride, ASF, ISE, Filtered 31 00950ISE05 0.04 no change
Fluoride, low-level, Filtered 1260 00950IC024 0.01 0.011
Fonofos 2001 04095GCM35 0.005 0.0022
gamma-HCH (Lindane) 2001 39341GCM35 0.007 0.0020
Hexachlorobenzene 1383 39700GCM57 0.15 no change
Hexachlorobutadiene 1383 39702GCM57 0.1 0.12
Hexachlorobutadiene 2021 39702GCM66 0.03 no change
Hexachlorocyclopentadiene 1383 34386GCM57 0.2 0.25
Hexachloroethane 1383 34396GCM57 0.1 0.12
Hexachloroethane 2021 34396GCM66 0.07 no change
Hexahydrohexamethyl cyclopentabenzopyran (HHCB) 1433 62075GCM37 0.3 0.026
Hexazinone 2001 04025GCM39 0.004 no change
Hg, Fil, CVAF 2707 71890CV014 0.005 no change
Hg, UnFil, CVAF 2708 71900CV018 0.005 no change
Imazaquin 2060 50356LCM29 0.03 hold
Imazethapyr 2060 50407LCM29 0.03 hold
Imidacloprid 2060 61695LCM29 0.03 hold
Indeno[1,2,3-cd]pyrene 1383 34403GCM57 0.2 0.19
Indole 1433 62076GCM37 0.04 no change
Iodide, Colorimetry, ASF, ceric-arsenious, Filtered 1202 71865CL033 0.001 no change
Iprodione 2001 61593GCM39 0.007 no change
Iron, DIS 645 01046PLA11 2 3
Iron, Unfiltered, ICP 2359 01045PLA15 7 4.6
Isoborneol 1433 62077GCM37 0.09 no change
Isofenphos 2001 61594GCM39 0.003 no change
Isophorone 1433 34409GCM37 0.04 no change
Isophorone 1383 34408GCM57 0.2 0.13
Isopropylbenzene 2021 77223GCM66 0.02 0.021
Isopropylbenzene (cumene) 1433 62078GCM37 0.1 0.15
Isoquinoline 1433 62079GCM37 0.2 0.023
lambda-Cyhalothrin 2001 61595GCM39 0.005 no change
Lead,Filtered 1792 01049PLM43 0.03 0.015
Lead, Unfiltered 2380 01051PLM48 0.05 0.03
Linuron 2001 82666GCM35 0.03 no change
Linuron 2060 38478LCM29 0.02 hold
Lithium, Filtered 2505 01130PLM40 0.5 0.22
Lithium, DIS 664 01130PLA11 0.03 no change
Lithium, Unfiltered 2381 01132PLM48 0.3 0.15
Lithium, Unfiltered, ICP 2361 01132PLA15 0.04 no change
m- and p-Xylene 4025 85795GCM59 0.01 0.025
m- and p-Xylene 2021 85795GCM66 0.04 no change
Magnesium, DIS 663 00925PLA11 0.006 0.008
Magnesium, Unfiltered, ICP 2362 00927PLA15 0.004 no change
Malaoxon 2001 61652GCM39 0.04 no change
Malathion 2001 39532GCM35 0.01 0.008
Manganese, DIS 648 01056PLA11 0.1 no change
Manganese, Filtered 1793 01056PLM43 0.1 0.13
Manganese, Unfiltered 2382 01055PLM48 0.2 0.4
Manganese, Unfiltered, ICP 2363 01055PLA15 0.2 0.25
MBAS, TOTAL 96 38260SPEC2 0.05 0.07
MCPA 2060 38482LCM29 0.02 hold
MCPB 2060 38487LCM29 0.1 hold
Menthol 1433 62080GCM37 0.2 0.16
Metalaxyl 1433 50359GCM37 0.06 no change
Metalaxyl 2001 61596GCM39 0.0034 0.003
Metalaxyl 2060 50359LCM29 0.02 hold
Methidathion 2001 61598GCM39 0.003 no change
Methiocarb 2060 38501LCM29 0.02 hold
Methyl acetate 4025 77032GCM59 0.2 0.23
Methyl acrylate 2021 49991GCM66 0.3 0.28
Methyl acrylonitrile 2021 81593GCM66 0.1 0.13
Methyl iodide 2021 77424GCM66 0.2 0.13
Methyl methacrylate 2021 81597GCM66 0.1 0.11
Methyl parathion 2001 82667GCM35 0.004 no change
Methyl salicylate 1433 62081GCM37 0.05 0.022
Metolachlor 1433 39415GCM37 0.04 no change
Metolachlor 2001 39415GCM35 0.007 no change
Metribuzin 2001 82630GCM35 0.008 0.006
Metsulfuron-methyl 2060 61697LCM29 0.07 hold
Molinate 2001 82671GCM35 0.001 0.0013
Molybdenum, DIS 649 01060PLA11 1 2.2
Molybdenum,Filtered 1794 01060PLM43 0.01 0.014
Molybdenum, Unfiltered 2383 01062PLM48 0.05 no change
Molybdenum, Unfiltered, ICP 2364 01062PLA15 1 1.0
Monomethylarsenate, Filtered, ug/L, ICPMS 2736 62454PLM35 0.9 0.6
Myclobutanil 2001 61599GCM39 0.005 no change
Nitrogen, ammonia as N, WWR 2188 00610CL017 0.02 0.021
Nitrogen, Amonnia, colorimetry, ASF, salicylate-hypochlorite, Fil, acidified 1991 00608CL036 0.02 0.021
N,N-diethyl-meta-toluamide (DEET) 1433 62082GCM37 0.07 0.03
Naphthalene 1433 34443GCM37 0.02 0.020
Naphthalene 1383 34696GCM57 0.16 0.11
Naphthalene 2021 34696GCM66 0.1 0.09
Napropamide 2001 82684GCM35 0.009 0.004
Neburon 2060 49294LCM29 0.01 hold
Nickel, DIS 721 01065PLA11 2 2.1
Nickel, Filtered, collision 3130 01065PLM10 0.06 no change
Nickel, Unfiltered, collision 3131 01067PLM11 0.1 0.18
Nickel, Unfiltered, ICP 2365 01067PLA15 1 1.1
Nicosulfuron 2060 50364LCM29 0.05 hold
Nitrite, Kone 3117 61300049 0.001 0.0008
Nitrogen, Nitrite + Nitrate, LL, Colorimetry, ASF, cadmium reduction-diazotization, FIL 1979 00631CL050 0.008 0.005
Nitrogen, Nitrite + Nitrate, Colorimetry, ASF, cadmium reduction-diazotization, FIL 1975 00631CL048 0.02 0.019
Nitrogen, Nitrite + Nitrate, FIL, acidified 1990 00631CL047 0.02 0.019
Nitrobenzene 1383 34447GCM57 0.1 0.13
Nitrogen, Alkaline Persulfate, FCA 2755 62854CL062 0.05 no change
Nitrogen, Ammonia + Org N as N, Colorimetry, ASF, Microkjeldahl Digestion, FIL 1985 00623KJ002 0.05

no change
Nitrogen, Ammonia + Org N as N, Colorimetry, ASF, Microkjeldahl Digestion, WWR, acidified 1986 00625KJ008 0.05 no change
Nitrogen, Ammonia + Org N as N, Colorimetry, ASF, Microkjeldahl Digestion, FIL, acidified 1994 00623KJ003 0.05 no change
Nitrogen, Total , (NO2+NO3+NH3+Org-N), Fil, Alk-P digestion 2754 62854CL063 0.05 no change
Nitrogen, Total, (NO2+NO3+NH3+Org-N), Unf, acidified, Alk-P dig 2756 62855AKP01 0.05 no change
N-Nitrosodimethylamine 1383 34438GCM57 0.1 0.12
N-Nitrosodi-n-propylamine 1383 34428GCM57 0.2 no change
N-Nitrosodiphenylamine 1383 34433GCM57 0.2 0.14
Norflurazon 2060 49293LCM29 0.02 hold
n-Propylbenzene 2021 77224GCM66 0.02 0.018
o-Ethyl toluene 2021 77220GCM66 0.01 0.016
Carbon, Organic, Dissolved, (DOC), Glass Fiber, SO4 Acid Preserved 2613 00681OX008 0.2 0.33
ortho-PO4, Kone 3118 67100048 0.004 no change
Oryzalin 2060 49292LCM29 0.02

hold
Oxamyl 2060 38866LCM29 0.06 hold
Oxyfluorfen 2001 61600GCM39 0.003 0.005
o-Xylene 4025 77135GCM59 0.01 0.014
o-Xylene 2021 77135GCM66 0.02 0.016
p,p'-DDE 2001 34653GCM35 0.001 0.0010
para-Nonylphenol ( total) 1433 62085GCM37 1 no change
Paraoxon-methyl 2001 61664GCM39 0.005 no change
Parathion 2001 39542GCM35 0.01 0.007
p-Cresol 1433 62084GCM37 0.09 0.04
Pebulate 2001 82669GCM35 0.008 no change
Pendimethalin 2001 82683GCM35 0.006 no change
Pentachlorophenol 1433 34459GCM37 1 100
Pentachlorophenol 1383 39032GCM56 0.6 0.3
Phenanthrene 1433 34462GCM37 0.02 0.016
Phenanthrene 1383 34461GCM57 0.16 no change
Phenol 1433 34466GCM37 0.7 0.08
Phenol 1383 34694GCM56 0.22 0.14
Phosmet 2001 61601GCM39 0.1 0.017
Phosphorus as P, Colorimetry, ASF, Microkjeldahl Digestion, FIL 1983 00666KJ005 0.02 0.017
Phosphorus as P, Colorimetry, ASF, Microkjeldahl Digestion, WWR 1984 00665KJ009 0.02 0.017
Phosphorus as P, Colorimetry, ASF, Microkjeldahl Digestion, FIL, acidified 1992 00666KJ004 0.02 0.017
Phosphorus, Total , Filtered, mg/L as P, Alk-P digestion 2757 00666CL063 0.01 0.011
Phosphorus, total, Low Level - Filtered 2331 00666CL020 0.003 no change
Phosphorus, total, Low Level -WWR, Acidified 2332 00665CL021 0.006

0.004
Phosphorus, total, Low Level - WWR, Acidified 2333 00665CL021 0.006 0.004
Phosphorus, Total, Unfiltered, Acidified, mg/L as P, Alk-P digestion 2759 00665AKP01 0.01 0.013
Picloram 2060 49291LCM29 0.06 hold
Potassium LL, DIS 2774 00935PLO02 0.004 no change
Potassium, DIS 2773 00935PLO03 0.03 no change
Potassium,Unfiltered, ICP 2775 00937PLO01 0.1 0.04
Prometon 1433 04037GCM37 0.1 0.06
Prometon 2001 04037GCM35 0.006 no change
Prometryn 2001 04036GCM39 0.003 no change
Pronamide 2001 82676GCM35 0.002 0.0018
Propachlor 2001 04024GCM35 0.006 0.003
Propanil 2001 82679GCM35 0.007 0.005
Propargite 2001 82685GCM35 0.01 0.010
Propham 2060 49236LCM29 0.02

hold
Propiconazole 2060 50471LCM29 0.02 hold
Propoxur 2060 38538LCM29 0.03 hold
Pyrene 1433 34470GCM37 0.02 0.021
Pyrene 1383 34469GCM57 0.18 no change
Radon 1369 82303LSC01 20 no change
ROE AT 105 DEG C SUS 169 00530SLD04 15 no change
ROE AT 105 DEG C TOT 165 00500ROE12 13 no change
ROE, DISS. AT 180 C (TDS) 27 70300ROE10 10 no change
Salbutamol (Albuterol) 2080 6202000021 0.03 0.04
sec-Butylbenzene 2021 77350GCM66 0.01 0.017
Selenium, Filtered, collision 3132 01145PLM10 0.03 0.020
Selenium, Unfiltered, collision 3133 01147PLM11 0.06 0.05
Siduron 2060 38548LCM29 0.02 hold
Silica as SiO2, Colorimetry, ASF, Molybdate blue, FIL 56 00955CL064 0.1 0.10
Silica, DIS 667 00955PLA11 0.01 0.029
Silica, Unfiltered, ICP 2366 00956PLA15 0.01 no change
Silver, DIS 723 01075PLA11 2 no change
Silver, Filtered 1796 01075PLM43 0.004 0.005
Silver, Unfiltered 2386 01077PLM48 0.03 0.008
Silver, Unfiltered, ICP 2367 01077PLA15 2 no change
Simazine 2001 04035GCM35 0.005 0.003
Sodium, DIS 675 00930PLA11 0.06 0.05
Sodium, Unfiltered, ICP 2368 00929PLA15 0.2 0.12
Specific Conductance 69 90095WHT03 5 no change
Strontium, Filtered 2507 01080PLM40 0.4 0.20
Strontium, DIS 652 01080PLA11 0.2 no change
Strontium, Unfiltered 2387 01082PLM48 0.8 no change
Strontium, Unfiltered, ICP 2369 01082PLA15 0.4 0.3
Styrene 2021 77128GCM66 0.02 0.015
Sulfamethoxazole 2080 6202100021 0.08 no change
Sulfate, low-level, Filtered, 1263 00945IC024 0.01 0.011
Sulfate, Filtered 1572 00945IC022 0.09 no change
Sulfometuron-methyl 2060 50337LCM29 0.03 hold
Tebuconazole 2001 62852GCM14 0.01 no change
Tebuthiuron 2001 82670GCM35 0.01 0.014
Tebuthiuron 2060 82670LCM29 0.03 hold
Tefluthrin 2001 61606GCM39 0.005 no change
Terbacil 2001 82665GCM35 0.02 0.012
Terbacil 2060 04032LCM29 0.02 hold
Terbuthylazine 2001 04022GCM39 0.003 no change
tert-Amyl alcohol 4025 77073GCM59 0.3 no change
tert-Butyl alcohol 4025 77035GCM59 0.5 0.4
tert-Butyl methyl ether 4025 78032GCM59 0.02 0.03
tert-Butyl methyl ether 2021 78032GCM66 0.05 no change
tert-Butylbenzene 2021 77353GCM66 0.03 no change
tert-Pentyl methyl ether 4025 50005GCM59 0.02 0.022
tert-Pentyl methyl ether 2021 50005GCM66 0.03 no change
Tetrachloroethylene 1433 34476GCM37 0.06 no change
Tetrachloroethylene 2021 34475GCM66 0.02 0.013
Tetrachloromethane 2021 32102GCM66 0.03 0.026
Tetrahydrofuran 2021 81607GCM66 0.7 no change
Thallium Water, Filtered 2508 01057PLM40 0.02 0.01
Thallium, Water, Unfiltered 2388 01059PLM48 0.06 no change
Thiabendazole 2080 6280100021 0.03 no change
Thiobencarb 2001 82681GCM35 0.008 no change
Toluene 4025 34010GCM59 0.009 0.010
Toluene 2021 34010GCM66 0.009 no change
TPC 2606 00694COMB6 0.1 0.05
TPN 2607 49570COMB7 0.01 0.017
trans-1,2-Dichloroethylene 2021 34546GCM66 0.009 no change
trans-1,3-Dichloropropene 2021 34699GCM66 0.05 0.07
trans-1,4-Dichloro-2-butene 2021 73547GCM66 0.2 0.18
Tri(2-butoxyethyl) phosphate 1433 62093GCM37 0.4 no change
Tri(2-chloroethyl) phosphate 1433 62087GCM37 0.05 no change
Tri(dichloroisopropyl) phosphate 1433 62088GCM37 0.06 0.08
Triallate 2001 82678GCM35 0.003 0.0030
Tribufos 2001 61610GCM39 0.018 0.009
Tributyl phosphate 1433 62089GCM37 0.1 0.08
Trichloroethylene 2021 39180GCM66 0.01 0.011
Trichlorofluoromethane 2021 34488GCM66 0.04 no change
Triclopyr 2060 49235LCM29 0.04 hold
Triclosan 1433 62090GCM37 0.1 0.10
Triethyl citrate (ethyl citrate) 1433 62091GCM37 0.2 0.19
Trifluralin 2001 82661GCM35 0.006 0.009
Trimethoprim 2080 6202300021 0.01 0.017
Triphenyl phosphate 1433 62092GCM37 0.06 no change
Tungsten, Filtered 3136 01155PLM10 0.01 0.010
Tungsten, Unfiltered, collision 3137 01154PLM11 0.04 0.012
Turbidity, NTRU 2187 63676TS098 1 2
Uranium, Filtered 1797 22703PLM43 0.003 0.004
Uranium, Unfiltered 2389 28011PLM48 0.01 0.014
UV Absor Orgn 254nm 2614 50624UV005 0.007 0.005
UV Absor Orgn 280nm 2615 61726UV007 0.006 0.004
Vanadium, DIS 653 01085PLA11 0.5 0.4
Vanadium, Filtered, collision 3134 01085PLM10 0.08 no change
Vanadium, Unfiltered, collision 3135 01087PLM11 0.8 no change
Vanadium, Unfiltered, ICP 2370 01087PLA15 0.9 0.8
Vinyl chloride 2021 39175GCM66 0.04 0.03
Warfarin 2080 6202400021 0.05 0.04
Zinc, DIS 671 01090PLA11 1 2.3
Zinc, Filtered, collision 3138 01090PLM10 1 1.4
Zinc, Unfiltered, collision 3139 01092PLM11 1 no change
Zinc, Unfiltered, ICP 2371 01092PLA15 2 no change

For further information, contact:

Long-term Method Detection Level Project Chief (bfconnor@usgs.gov)
U.S. Geological Survey
Denver Federal Center
Mail Stop 401, Box 25046
Denver, CO 80225
303.236.1877


Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://bqs.usgs.gov/ibsp
Page Contact Information: Webmaster