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Box Plots for Analytes collected prior to Water Year 2000

Extreme values have been "clipped" or removed from the plot and designated as such with a blue dot. OBSP Box Plots Organized Numerically by NWQL Schedule(individual lab codes are grouped at the end).
*Due to the size of the dataset, schedules indicated with an astrik have a different start date.
The following abbreviations and formats apply to all of the posted charts:
‹RLA range with expected concentration less than the reporting level
LowerA range with the expected concentration in the lower end of the calibration range
UpperA range with the expected concentration in the upper end of the calibration range
NCount of samples in the specified range
MedMedian recovery of samples in the specified range
FPsigF-pseudosigma of samples in the specified range
MeanAverage recovery of samples in the specified range
StdStandard deviation of samples in the specified range
E CodesPercent of samples in the specified range that are estimated

These plots are presented in percent recovery.
OBSP Box Plots Organized Numerically by NWQL Schedule (individual lab codes are grouped at the end)

The charts and data that you might secure from this U.S. Geological Survey (USGS) web page (identified as "OBSP") have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

Lab Schedule 79 - Chlorophenoxy Acid Herbicide + Picloram and Dicamba by GC, Whole Water Recoverable

Choose an analyte below Parameter CAS#
2-(2,4,5-Trichlorophenoxy)propionic acid 39760 B 93-72-1
2,4,5-T 39740 B 93-76-5
2,4-D 39730 B 94-75-7
Dicamba 82052 A 1918-00-9
Dichlorprop 82183 A 120-36-5
Picloram 39720 A 1918-02-1

Lab Schedule 1304 - Chlorophenoxy Acid Herbicides by GC, Whole Water Recoverable

Choose an analyte below Parameter CAS#
2-(2,3,4-Trichlorophenoxy) propionic acid (Silvex) 39760 B 93-72-1
2,4,5-T 39740 B 93-76-5
2,4-D 39730 B 94-75-7
Dichlorprop 82183 A 120-36-5

Lab Schedule 1306 - EDB + DBCP

Choose an analyte below Parameter CAS#
1,2-Dibromo-3-chloropropane 82625 D 96-12-8
1,2-Dibromoethane 77651 D 106-93-4

Lab Schedule 1307 -   29 Regulated Volatile Organic Compounds, Whole Water Recoverable

Choose an analyte below Parameter CAS#
1,1,1-Trichloroethane 34506 B 71-55-6
1,1,2-Trichloro-1,2,2-trifluoroethane 77652 A 76-13-1
1,1-Dichloroethane 34496 B 75-34-3
1,1-Dichloroethene 34501 B 75-35-4
1,2-Dichlorobenzene 34536 B 95-50-1
1,2-Dichloroethane 32103 B 107-06-2
1,2-Dichloropropane 34541 B 78-87-5
1,3-Dichlorobenzene 34566 B 541-73-1
1,4-Dichlorobenzene 34571 B 106-46-7
Benzene 34030 B 71-43-2
Bromodichloromethane 32101 B 75-27-4
Bromoform 32104 B 75-25-2
Chlorobenzene 34301 B 108-90-7
Chloroform 32106 B 67-66-3
cis-1,2-Dichloroethene 77093 A 156-59-2
Dibromochloromethane 32105 B 124-48-1
Dichlorodifluoromethane 34668 B 75-71-8
Dichloromethane (Methylene Chloride) 34423 B 75-09-2
Diethyl ether 81576 B 60-29-7
Diisopropyl ether 81577 B 108-20-3
Ethyl tert-butyl ether 50004 B 637-92-3
Ethylbenzene 34371 B 100-41-4
m and p Xylene 85795 E not assigned
o Xylene 77135 E 95-47-6
Styrene 77128 B 100-42-5
tert-Butyl methyl ether 78032 A 1634-04-4
tert-Pentyl methyl ether 50005 B 994-05-8
Tetrachloroethene 34475 B 127-18-4
Tetrachloromethane 32102 B 56-23-5
Toluene 34010 B 108-88-3
trans-1,2-Dichloroethene 34546 B 156-60-5
Trichloroethene 39180 B 79-01-6
Trichlorofluoromethane 34488 B 75-69-4
Vinyl Chloride 39175 B 75-01-4

Lab Schedule 1319 - Organophosphorus Pesticides by GC, Whole Water Recoverable

Choose an analyte below Parameter CAS#
Chlorpyrifos 38932 A 2921-88-2
Diazinon 39570 B 333-41-5
Disulfoton 39011 A 298-04-4
Ethion 39398 B 563-12-2
Fonofos 82614 C 944-22-9
Malathion 39530 B 121-75-5
Parathion 39540 B 56-38-2
Parathion-methyl 39600 B 298-00-0
Phorate 39023 A 298-02-2

Lab Schedule 1324 - Organochlorine Pesticides by GC, Whole Water Recoverable

Choose an analyte below Parameter CAS#
Aldrin 39330 C 309-00-2
Alpha-Endosulfan 39388 C 959-98-8
Chlordane, Technical mix 39350 B 57-74-9
Dieldrin 39380 C 60-57-1
Endrin 39390 C 72-20-8
Heptachlor 39410 C 76-44-8
Heptachlor Epoxide 39420 C 1024-57-3
Lindane 39340 C 58-89-9
p,p'-DDD 39360 C 72-54-8
p,p'-DDE 39365 C 72-55-9
p,p'-DDT 39370 C 50-29-3
p,p'-Methoxychlor 39480 B 72-43-5
Toxaphene 39400 B 8001-35-2

Lab Schedule 1364 - PCB's as Individual Aroclors

Choose an analyte below Parameter CAS#
Aroclor 1221 39488 D 11104-28-2
Aroclor 1242 81648 B not available
Aroclor 1254 39504 D 11097-69-1
Aroclor 1260 39508 D 11096-82-5

Lab Schedule 1379 - Organonitrogen Pesticides by GCMS, (triazines), Filtered

Choose an analyte below Parameter CAS#
Acetochlor 49260F 34256-82-1
Alachlor 46342A 15972-60-8
Atrazine 39632A 1912-24-9
Carboxin 04027A 5234-68-4
Cyanazine 04041A 21725-46-2
Cycloate 04031A 1134-23-2
Deethylatrazine (Desethyl atrazine) 04040A 6190-65-4
Deisopropylatrazine 04038A 1007-28-9
Hexazinone 04025A 51235-04-2
Metolachlor 39415A 51218-45-2
Metribuzin 82630A 21087-64-9
Prometon 04037A 1610-18-0
Prometryn 04036A 7287-19-6
Propachlor 04024F 1918-16-7
Propazine 38535A 139-40-2
Simazine 04035A 122-34-9
Simetryn 04030A 1017-70-6
Terbacil 04032A 5902-51-2
Trifluralin 04023A 1582-09-8
Vernolate 04034A 1929-77-7

Lab Schedule 1383 - Semivolatile Compounds (base/neutral/acid - BNA), Whole Water Recoverable

Choose an analyte below Parameter CAS#
1,2,4-Trichlorobenzene 34551A 120-82-1
1,2-Dichlorobenzene 34536A 95-50-1
1,2-Diphenylhydrazine 82626A 122-66-7
1,4-Dichlorobenzene 34571A 106-46-7
2,4,6-Trichlorophenol 34621A 88-06-2
2,4-Dinitrotoluene 34611A 121-14-2
2,6-Dinitrotoluene 34626A 606-20-2
2-Chlorophenol 34586A 95-57-8
2-Nitrophenol 34591A 88-75-5
3,3^-Dichlorobenzidine 34631A 91-94-1
4-Bromophenylphenylether 34636A 101-55-3
4-Chloro-3-methylphenol 34452A 59-50-7
4-Chlorophenyl phenyl ether 34641B 7005-72-3
4-Nitrophenol 34646A 100-02-7
Acenaphthene 34205A 83-32-9
Acenaphthylene 34200A 208-96-8
Anthracene 34220A 120-12-7
Benz[a]anthracene 34526A 56-55-3
Benzo[a]pyrene 34247A 50-32-8
Benzo[b]fluoranthene 34230A 205-99-2
Benzo[ghi]perylene 34521A 191-24-2
bis(2-Ethylhexyl) phthalate 39100A 117-81-7
Butylbenzyl phthalate 34292A 85-68-7
Chrysene 34320A 218-01-9
Dibenz[a,h]anthracene 34556A 53-70-3
Diethyl phthalate 34336A 84-66-2
Dimethyl phthalate 34341A 131-11-3
Di-n-octyl phthalate 34596A 117-84-0
Fluoranthene 34376A 206-44-0
Fluorene 34381A 86-73-7
Hexachlorobenzene 39700A 118-74-1
Hexachlorocyclopentadiene 34386A 77-47-4
Hexachloroethane 34396A 67-72-1
Indeno[1,2,3-cd]pyrene 34403A 193-39-5
Isophorone 34408A 78-59-1
Naphthalene 34696A 91-20-3
Nitrobenzene 34447A 98-95-3
N-Nitrosodimethylamine 34438A 62-75-9
N-Nitrosodi-n-propylamine 34428A 621-64-7
Pentachlorophenol 39032A 87-86-5
Phenanthrene 34461A 85-01-8
Phenol 34694A 108-95-2
Pyrene 34469A 129-00-0

Lab Schedule 1389 - Organonitrogen Pesticides by GCMS, (triazines), Whole Water Recoverable

Choose an analyte below Parameter CAS#
Alachlor 77825C 15972-60-8
Ametryn 82184A 834-12-8
Atrazine 39630A 1912-24-9
Bromacil 30234A 314-40-9
Butachlor 30235A 23184-66-9
Butylate 30236A 2008-41-5
Carboxin 30245A 5234-68-4
Cyanazine 81757A 21725-46-2
Cycloate 30254A 1134-23-2
Deethylatrazine 75981A 6190-65-4
Deisopropylatrazine 75980A 1007-28-9
Diphenamid 30255A 957-51-7
Hexazinone 30264A 51235-04-2
Metolachlor 82612C 51218-45-2
Metribuzin 82611C 21087-64-9
Prometon 39056A 1610-18-0
Prometryn 39057A 7287-19-6
Propachlor 30295A 1918-16-7
Propazine 39024A 139-40-2
Alachlor 39055A 122-34-9
Simetryn 39054A 1014-70-6
Terbacil 30311A 5902-51-2
Trifluralin 39030C 1582-09-8
Vernolate 30324A 1929-77-7

Lab Schedule 1398 - Low Level Organochlorine Pesticides by GC, Whole Water Recoverable

Choose an analyte below Parameter CAS#
Aldrin 39330B 309-00-2
alpha-Endosulfan (endosulfan I) 39388B 959-98-8
Chlordane Technical 39350B 57-74-9
Dieldrin 39380B 60-57-1
Endrin 39390B 72-20-8
Heptachlor 39410B 76-44-8
Heptachlor Epoxide 39420B 1024-57-3
Lindane 39340B 58-89-9
Mirex 39755B 2385-85-5
p,p'-DDD 39360B 72-54-8
p,p'-DDE 39365D 72-55-9
p,p'-DDT 39370B 50-29-3
p,p'-Methoxychlor 39480B 72-43-5
Toxaphene 39400B 8001-35-2

Lab Schedule 1608 - Organochlorine Pesticides plus Aroclors by GC, Whole Water Recoverable (NPDES - EPA 608)

Choose an analyte below Parameter CAS#
Aldrin 39330D 309-00-2
alpha-Endosulfan (endosulfan I) 34361D 959-98-8
alpha-HCH 39337D 319-84-6
Aroclor 1016 81648B -
Aroclor 1221 39488D 11104-28-2
Aroclor 1232 39492D 11141-16-5
Aroclor 1242 81648B -
Aroclor 1248 39500D 12672-29-6
Aroclor 1254 39504D 11097-69-1
Aroclor 1260 39508D 11096-82-5
beta-Endosulfan (endosulfan II) 34356D 33213-65-9
beta-HCH 39338D 319-85-7
Chlordane Technical 39350D 57-74-9
cis-Chlordane 39062D 5103-71-9
delta chlordane (delta-HCH) 34259D 319-86-8
Diazinon -- not available
Dieldrin 39380D 60-57-1
Endosulfan Sulfate 34351D 1031-07-8
Endrin 39390D 72-20-8
Endrin Aldehyde 34366D 7421-93-4
Heptachlor 39410D 76-44-8
Heptachlor Epoxide 39420D 1024-57-3
Lindane 39340D 58-89-9
p,p'-DDD 39310D 72-54-8
p,p'-DDE 39320D 72-55-9
p,p'-DDT 39300D 50-29-3
Toxaphene 39400D 8001-35-2
trans-Chlordane 39065D 50-29-3

Lab Schedule 2001 - Pesticides determinations by SPE and GCMS, Filtered

Choose an analyte below Parameter CAS#
2,6-Diethylaniline 82660D 579-66-8
Acetochlor 49260D 34256-82-1
Alachlor 46342D 15972-60-8
alpha-HCH 34253D 319-84-6
Atrazine 39632D 1912-24-9
Azinphos-methyl 82686D 86-50-0
Benfluralin 82673D 1861-40-1
Butylate 04028D 2008-41-5
Carbaryl 82680D 63-25-2
Carbofuran 82674D 1563-66-2
Chlorpyrifos 38933D 2921-88-2
cis_Permethrin 82687D 54774-45-7
Cyanazine 04041D 21725-46-2
Dacthal 82682D 1861-32-1
Deethylatrazine 04040D 6190-65-4
Diazinon 39572D 333-41-5
Dieldrin 39381D 60-57-1
Disulfoton 82677D 298-04-4
EPTC 82668D 759-94-4
Ethalfluralin 82663D 55283-68-6
Ethoprophos 82672D 13194-48-4
Fonofos 04095D 944-22-9
Lindane 39341D 58-89-9
Linuron 82666D 330-55-2
Malathion 39532D 121-75-5
Metolachlor 39415D 51218-45-2
Metribuzin 82630D 21087-64-9
Molinate 82671D 2212-67-1
Napropamide 82684D 15299-99-7
p,p'-DDE 34653D 72-55-9
Parathion 39542D 56-38-2
Parathion_methyl 82667D 298-00-0
Pebulate 82669D 1114-71-2
Pendimethalin 82683D 40487-42-1
Phorate 82664D 298-02-2
Prometon 04037D 1610-18-0
Propachlor 04024D 1918-16-7
Propargite 82685D 2312-35-8
Propyzamide 82676D 23950-58-5
Simazine 04035D 122-34-9
Tebuthiuron 82670D 34014-18-1
Terbacil 82665D 5902-51-2
Terbufos 82675D 13071-79-9
Thiobencarb 82681D 28249-77-6
Triallate 82678D 2303-17-5
Trifluralin 82661D 1582-09-8

Lab Schedule 2021 - NAWQA 85 Volatile Organic Compounds by GCMS, Whole Water Recoverable

Choose an analyte below Parameter CAS#
1,1,1,2-Tetrachloroethane 77562 D 630-20-6
1,1,1-Trichloroethane 34506 E 71-55-6
1,1,2,2-Tetrachloroethane 34516 D 79-34-5
1,1,2-Trichloroethane 34511 E 79-00-5
1,1,2-Trichloro-1,2,2-trifluoroethane 77652 D 76-13-1
1,1-Dichloroethane 34496 E 75-34-3
1,1-Dichloroethene 34501 E 75-35-4
1,1-Dichloropropene 77186 D 563-58-6
1,2,3,4-Tetramethylbenzene 49999 A 488-23-3
1,2,3,5-Tetramethylbenzene 50000 A 527-53-7
1,2,3-Trichlorobenzene 77613 D 87-61-6
1,2,3-Trichloropropane 77443 D 96-18-4
1,2,3-Trimethylbenzene 77221 A 526-73-8
1,2,4-Trichlorobenzene 34551 F 120-82-1
1,2,4-Trimethylbenzene 77222 D 95-63-6
1,2-Dibromo-3-chloropropane 82625 F 96-12-8
1,2-Dibromoethane 77651 G 106-93-4
1,2-Dichlorobenzene 34536 F 95-50-1
1,2-Dichloroethane 32103 E 107-06-2
1,2-Dichloropropane 34541 E 78-87-5
1,3,5-Trimethylbenzene D 108-67-8
1,3-Dichlorobenzene 34566 E 541-73-1
1,3-Dichloropropane 77173 D 142-28-9
1,4-Dichlorobenzene 34571 F 106-46-7
2,2-Dichloropropane 77170 D 594-20-7
2-Butanone 81595 B 78-93-3
2-Chlorotoluene 77275 D 95-49-8
2-Hexanone 77103 B 591-78-6
3-Chloropropene 78109 A 107-05-1
4-Chlorotoluene 77277 D 106-43-4
4-Isopropyltoluene 77356 D 99-87-6
4-Methyl-2-pentanone 78133 B 108-10-1
Acetone 81552 B 67-64-1
Acrylonitrile 34215 B 107-13-1
Benzene 34030 E 71-43-2
Bromobenzene 81555 D 108-86-1
Bromochloromethane 77297 D 74-97-5
Bromodichloromethane 32101 E 75-27-4
Bromoethene (Vinyl Bromide) 50002 A 593-60-2
Bromoform 32104 E 75-25-2
Bromomethane 34413 D 74-83-9
Butylbenzene 77342 D 104-51-8
Carbon disulfide 77041 B 75-15-0
Chlorobenzene 34301 E 108-90-7
Chloroethane 34311 D 75-00-3
Chloroform 32106 E 67-66-3
Chloromethane 34418 D 74-87-3
cis-1,2-Dichloroethene 77093 E 156-59-2
cis-1,3-Dichloropropene 34704 D 10061-01-5
Dibromochloromethane 32105 E 124-48-1
Dibromomethane 30217 D 74-95-3
Dichlorodifluoromethane 34668 D 75-71-8
Dichloromethane (Methylene Chloride) 34423 E 75-09-2
Diethylether 81576 A 60-29-7
Diisopropylether 81577 A 108-20-3
Ethyl methacrylate 73570 A 97-63-2
Ethyl tert-butyl ether 50004 A 637-92-3
Ethylbenzene 34371 E 100-41-4
Hexachlorobutadiene 39702 E 87-68-3
Hexachloroethane 34396 B 67-72-1
Isopropylbenzene 77223 D 98-82-8
m and p Xylene 85795 D not assigned
Methyl acrylate 49991 A 96-33-3
Methyl acrylonitrile 81593 A 126-98-7
Methyl iodide 77424 A 74-88-4
Methyl methacrylate 81597 A 80-62-6
n-Propylbenzene 77224 D 103-65-1
Naphthalene 34696 E 91-20-3
o-Ethyltoluene 77220 A 611-14-3
o Xylene 77135 D 95-47-6
sec-Butylbenzene 77350 D 135-98-8
Styrene 77128 E 100-42-5
tert-Butyl methyl ether 78032 D 1634-04-4
tert-Butylbenzene 77353 D 98-06-6
tert-Pentyl methyl ether 50005 A 994-05-8
Tetrachloroethene 34475 E 127-18-4
Tetrachloromethane 32102 E 56-23-5
Tetrahydrofuran 81607 A 109-99-9
Toluene 34010 E 108-88-3
trans-1,2-Dichloroethene 34546 E 156-60-5
trans-1,3-Dichloropropene 34699 D 10061-02-6
trans-1,4-Dichloro-2-butene 73547 A 110-57-6
Trichloroethene 39180 E 79-01-6
Trichlorofluoromethane 34488 D 75-69-4
Vinyl Chloride 39175 E 75-01-4

Lab Schedule 2050 - Pesticides (Carbopak-B SPE cartridge - Lab), Filtered

Choose an analyte below Parameter CAS#
2,4,5-T 39742A 93-76-5
2,4-D 39732A 94-75-7
2,4-DB 38746A 94-82-6
3-Hydroxycarbofuran 49308A 16655-82-6
Acifluorfen 49315A 50594-66-6
Aldicarb 49312A 116-06-3
Aldicarb sulfone 49313A 1646-88-4
Aldicarb sulfoxide 49314A 1646-87-3
Bentazon 38711A 25057-89-0
Bromacil 04029A 314-40-9
Bromoxynil 49311A 1689-84-5
Carbaryl 49310A 63-25-2
Carbofuran 49309A 1563-66-2
Chloramben, methyl ester 61188A 7286-84-2
Chlorothalonil 49306A 1897-45-6
Clopyralid 49305A 1702-17-6
Dacthal monoacid 49304A 887-54-7
Dicamba 38442A 1918-00-9
Dichlobenil 49303A 1194-65-6
Dichloroprop (Dichlorprop) 49302A 120-36-5
Dinoseb 49301A 88-85-7
Diuron 49300A 330-54-1
Fenuron 49297A 101-42-8
Fluometuron 38811A 2164-17-2
Linuron 38478A 330-55-2
MCPA 38482A 94-74-6
MCPB 38487A 94-81-5
Methiocarb 38501A 2032-65-7
Methomyl 49296A 16752-77-5
Neburon 49294A 555-37-3
Norflurazon 49293A 27314-13-2
Oryzalin 49292A 19044-88-3
Oxamyl 38866A 23135-22-0
Picloram 49291A 1918-02-1
Propham 49236A 122-42-9
Propoxur 38538A 114-26-1
Triclopyr 49235A 55335-06-3

Lab Code 52 - Phenol, Total Recoverable

Choose an analyte below Parameter CAS#
Phenol 32730 B not assigned

Lab Code 113 - Dissolved Organic Carbon, Filtered

Choose an analyte below Parameter CAS#
DOC 00681 D not assigned

Lab Code 114 - Total Organic Carbon, Whole Water Recoverable

Choose an analyte below Parameter CAS#
TOC 00680 A not assigned

Lab Code 2125 - Oil and Grease

Choose an analyte below Parameter CAS#
Oil and Grease 00556 B not assigned

Lab Code 2322 - Phenol, Total Recoverable

Choose an analyte below Parameter CAS#
Phenol 32730 B not assigned

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Questions/Comments?  dbeaty@usgs.gov