University, Subject, Country, Region, World
US Environmental Protection Agency 481 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Mar 11, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (998.570) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Toxicology
bioinformatics
Computational Toxicology
Systems Biology
Endocrine Disruption
Metrics
H-Index
i10 Index
Citation Counts
88
199
34,609
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* Total H IndexRankings
Ranking Based On Selection: 2
Lung diseases
iron homeostasis
fibers
particles
air pollution
Metrics
H-Index
i10 Index
Citation Counts
86
292
25,470
* Total H IndexRankings
Ranking Based On Selection: 3
Nanotechnology
Materials Chemistry
Water Reserach
Metrics
H-Index
i10 Index
Citation Counts
82
228
27,315
* Total H IndexRankings
Ranking Based On Selection: 4
Environmental Soil Chemistry
Synchrotron Techniques
Bioavailability
Nanoparticles in the Environment
Plant Uptake
Metrics
H-Index
i10 Index
Citation Counts
72
194
22,123
* Total H IndexRankings
Ranking Based On Selection: 5
Chemistry
Cheminformatics
Nuclear Magnetic Resonance
Drug Discovery
Metrics
H-Index
i10 Index
Citation Counts
71
271
19,729
* Total H IndexRankings
Ranking Based On Selection: 6
toxicology
genomics
Metrics
H-Index
i10 Index
Citation Counts
72
172
16,590
* Total H IndexRankings
Ranking Based On Selection: 7
environmental toxicology
drug discovery
nuclear receptors
Metrics
H-Index
i10 Index
Citation Counts
67
115
27,691
* Total H IndexRankings
Ranking Based On Selection: 8
Computational chemistry
cheminformatics
toxicology
Metrics
H-Index
i10 Index
Citation Counts
66
115
17,372
* Total H IndexRankings
Ranking Based On Selection: 9
Molecular Microbial Ecology
drinking water
microbial ecology
environmental microbiology
water
Metrics
H-Index
i10 Index
Citation Counts
62
131
10,280
* Total H IndexRankings
Ranking Based On Selection: 10
Metrics
H-Index
i10 Index
Citation Counts
60
149
12,489
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Through advanced, institution-specific analytics and benchmarking, gain data-driven strategic insights into your academic performance, global standing, and competitive strengths. Compare your institution with 20 similarly ranked institutions at city, country, regional, and global levels, as well as with those in similar standings across 13 subjects, to uncover your institution’s strengths. More Info
* Total H IndexRankings
Ranking Based On Selection: 11
Metrics
H-Index
i10 Index
Citation Counts
60
156
14,612
* Total H IndexRankings
Ranking Based On Selection: 12
Atmospheric Chemistry
Metrics
H-Index
i10 Index
Citation Counts
59
92
12,029
* Total H IndexRankings
Ranking Based On Selection: 13
Xenobiotic compounds in environmental media
Metrics
H-Index
i10 Index
Citation Counts
58
107
14,031
* Total H IndexRankings
Ranking Based On Selection: 14
developmental biology
Metrics
H-Index
i10 Index
Citation Counts
58
130
14,370
* Total H IndexRankings
Ranking Based On Selection: 15
Metrics
H-Index
i10 Index
Citation Counts
58
152
11,200
* Total H IndexRankings
Ranking Based On Selection: 16
toxicology
pharmacokinetics
thyroid
PFAS
dioxins
Metrics
H-Index
i10 Index
Citation Counts
57
113
14,826
* Total H IndexRankings
Ranking Based On Selection: 17
Environmental Law
Environmental Law and Policy
Metrics
H-Index
i10 Index
Citation Counts
55
93
9,957
* Total H IndexRankings
Ranking Based On Selection: 18
Environment
landscape ecology
remote sensing
GIS
Metrics
H-Index
i10 Index
Citation Counts
55
104
21,413
* Total H IndexRankings
Ranking Based On Selection: 19
biostatistics
dose-response
pharmacokinetics
high throughput screening
quantitative risk assessment
Metrics
H-Index
i10 Index
Citation Counts
55
104
12,444
* Total H IndexRankings
Ranking Based On Selection: 20
aquatic ecology
fluvial geomorphology
hydrology
physical habitat
Metrics
H-Index
i10 Index
Citation Counts
57
92
10,536
* Total H IndexRankings
Ranking Based On Selection: 21
environmental microbiology
microbial ecology
regenerative system design
Metrics
H-Index
i10 Index
Citation Counts
55
126
13,760
* Total H IndexRankings
Ranking Based On Selection: 22
aquatic toxicology
oil
bioaccumulation
pharmacokinetics
Metrics
H-Index
i10 Index
Citation Counts
53
135
9,472
* Total H IndexRankings
Ranking Based On Selection: 23
neurotoxicology
developmental toxicology
chemical screening
zebrafish
Metrics
H-Index
i10 Index
Citation Counts
53
110
10,546
* Total H IndexRankings
Ranking Based On Selection: 24
mathematical modeling
computational toxicology
pharmacokinetics
exposure modeling
IVIVE
Metrics
H-Index
i10 Index
Citation Counts
52
92
10,334
* Total H IndexRankings
Ranking Based On Selection: 25
biology
Metrics
H-Index
i10 Index
Citation Counts
52
110
15,873
Richard Judson
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
88
199
34,609
Toxicology
bioinformatics
Computational Toxicology
Systems Biology
Endocrine Disruption
Andrew Ghio
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
86
292
25,470
Lung diseases
iron homeostasis
fibers
particles
air pollution
Mallikarjuna Nadagouda
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
82
228
27,315
Nanotechnology
Materials Chemistry
Water Reserach
Kirk G Scheckel
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
72
194
22,123
Environmental Soil Chemistry
Synchrotron Techniques
Bioavailability
Nanoparticles in the Environment
Plant Uptake
Antony John Williams
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
71
271
19,729
Chemistry
Cheminformatics
Nuclear Magnetic Resonance
Drug Discovery
Russell S Thomas
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
72
172
16,590
Keith A Houck
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
67
115
27,691
Ann M Richard
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
66
115
17,372
Computational chemistry
cheminformatics
toxicology
Jorge W Santo Domingo
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
62
131
10,280
Molecular Microbial Ecology
drinking water
microbial ecology
environmental microbiology
water
Jia Xing
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
60
149
12,489
360° Institutional Performance & Benchmarking Click Here for Live Demo
Through advanced, institution-specific analytics and benchmarking, gain data-driven strategic insights into your academic performance, global standing, and competitive strengths. Compare your institution with 20 similarly ranked institutions at city, country, regional, and global levels, as well as with those in similar standings across 13 subjects, to uncover your institution’s strengths. More Info
Grace Patlewicz
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
60
156
14,612
John H Offenberg
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
59
92
12,029
Mark Strynar
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
58
107
14,031
Thomas B Knudsen
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
58
130
14,370
Brian Gullett
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
58
152
11,200
Michael Devito
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
57
113
14,826
Ahjond Garmestani
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
55
93
9,957
Environmental Law
Environmental Law and Policy
James Wickham
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
55
104
21,413
Environment
landscape ecology
remote sensing
GIS
R Woodrow Setzer
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
55
104
12,444
biostatistics
dose-response
pharmacokinetics
high throughput screening
quantitative risk assessment
Philip R Kaufmann|Philip Robert Kaufmann, P.R. Kaufmann
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
57
92
10,536
aquatic ecology
fluvial geomorphology
hydrology
physical habitat
Jay Garland
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
55
126
13,760
environmental microbiology
microbial ecology
regenerative system design
Mace G Barron
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
53
135
9,472
Stephanie Padilla
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
53
110
10,546
neurotoxicology
developmental toxicology
chemical screening
zebrafish
John Wambaugh
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
52
92
10,334
mathematical modeling
computational toxicology
pharmacokinetics
exposure modeling
IVIVE
James Lazorchak
US Environmental Protection Agency
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
52
110
15,873
