Citation Rankings
Highly Cited Researchers
Engineering & Technology / Environmental Science & Engineering Highly Cited Researchers 27 Scientists Citation Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Water sanitation hygiene health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
85,183
34,401
0.404
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Air pollution
climate change
health impacts
energy
ozone
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,673
17,020
0.751
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Environmental sciences
Environmental engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,948
15,956
0.762
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Oxidative stress
redox biology
redox toxicology
air pollution health effects
omega-3 fatty acids
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,491
5,107
0.310
* Total Citation Counts Rankings
Ranking Based On Selection: 5
water
sanitation
environmental health
risk assessment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,059
5,515
0.609
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Water resources
engineering
economics
resource management
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,386
2,995
0.469
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Environmental Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,991
2,533
0.508
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Human-environment Interactions
Land Use
Conservation Biology
Systems Modeling
GIS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,956
2,328
0.470
* Total Citation Counts Rankings
Ranking Based On Selection: 9
global environmental health
public health engineering
rural water supply
water and health
WASH
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,541
2,985
0.657
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Air Pollution
Atmospheric Chemisty
Health Effects of Air pollutants
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,949
1,024
0.347
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Health Effects of Air Pollution
Inhallation Toxcicology
Pathology
Immunology
Flow Cytometry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,511
479
0.191
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Occupational Health
Industrial Hygiene
Computational Fluid dynamics
Ventilation
Exposure
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,490
613
0.246
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Air Quality
Emissions
Aircraft
Onroad Traffic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,441
1,006
0.412
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Environmental Engineering
Environmental Microbiology
Water Quality
Sanitation
Monitoring and Evaluation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,691
922
0.545
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,642
1,461
0.890
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Water Resource Managment
Environmental Financial Risk
Coupled Human and Natural Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,561
1,053
0.675
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Air Pollution Modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,560
776
0.497
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Water
Sanitation
Urban Planning
Infrastructure Sustainability
Hydroinformatics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,506
678
0.450
* Total Citation Counts Rankings
Ranking Based On Selection: 19
environmental science
water quality
risk management
implementation science
systematic review
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,036
569
0.549
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Environmental Engineering
Water
Sanitation
and Hygiene
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
815
637
0.782
* Total Citation Counts Rankings
Ranking Based On Selection: 21
water
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
694
422
0.608
* Total Citation Counts Rankings
Ranking Based On Selection: 22
environmental engineering
environmental health
enteric pathogens
antimicrobial resistance
gut health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
200
180
0.900
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Environmental Engineering
Sanitation Engineering
Public Health Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
138
135
0.978
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Environmental Sciences & Engineering
Public Health
Computational Toxicology
Machine Learning
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
111
111
1.000
* Total Citation Counts Rankings
Ranking Based On Selection: 25
environmental engineering
environmental epidemiology
risk assessment
health disparities
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
80
64
0.800
* Total Citation Counts Rankings
Rankings
4,292
2,037
29
Ranking Based On Selection: 1
Jamie Bartram
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
85,183
34,401
0.404
Water sanitation hygiene health
* Total Citation Counts Rankings
Rankings
34,855
15,636
168
Ranking Based On Selection: 2
J Jason West
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,673
17,020
0.751
Air pollution
climate change
health impacts
energy
ozone
* Total Citation Counts Rankings
Rankings
39,015
17,327
188
Ranking Based On Selection: 3
Marc Serre
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,948
15,956
0.762
Environmental sciences
Environmental engineering
* Total Citation Counts Rankings
Rankings
54,064
23,190
244
Ranking Based On Selection: 4
James Samet
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,491
5,107
0.310
Oxidative stress
redox biology
redox toxicology
air pollution health effects
omega-3 fatty acids
* Total Citation Counts Rankings
Rankings
112,754
44,243
454
Ranking Based On Selection: 5
Joe Brown
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,059
5,515
0.609
water
sanitation
environmental health
risk assessment
* Total Citation Counts Rankings
Rankings
164,451
60,956
583
Ranking Based On Selection: 6
Gregory W Characklis
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,386
2,995
0.469
Water resources
engineering
economics
resource management
* Total Citation Counts Rankings
Rankings
209,757
74,820
694
Ranking Based On Selection: 7
Glenn Morrison
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,991
2,533
0.508
Environmental Engineering
* Total Citation Counts Rankings
Rankings
211,107
75,227
696
Ranking Based On Selection: 8
Xiaodong Chen
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,956
2,328
0.470
Human-environment Interactions
Land Use
Conservation Biology
Systems Modeling
GIS
* Total Citation Counts Rankings
Rankings
229,252
80,594
748
Ranking Based On Selection: 9
Ryan Cronk
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,541
2,985
0.657
global environmental health
public health engineering
rural water supply
water and health
WASH
* Total Citation Counts Rankings
Rankings
333,931
110,578
972
Ranking Based On Selection: 10
Kenneth G Sexton
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,949
1,024
0.347
Air Pollution
Atmospheric Chemisty
Health Effects of Air pollutants
* Total Citation Counts Rankings
Rankings
379,387
123,176
1,056
Ranking Based On Selection: 11
John C Lay
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,511
479
0.191
Health Effects of Air Pollution
Inhallation Toxcicology
Pathology
Immunology
Flow Cytometry
* Total Citation Counts Rankings
Rankings
381,786
123,810
1,061
Ranking Based On Selection: 12
Michael R Flynn
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,490
613
0.246
Occupational Health
Industrial Hygiene
Computational Fluid dynamics
Ventilation
Exposure
* Total Citation Counts Rankings
Rankings
387,735
125,434
1,069
Ranking Based On Selection: 13
Sarav Arunachalam|Saravanan Arunachalam, S Arunachalam
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,441
1,006
0.412
Air Quality
Emissions
Aircraft
Onroad Traffic
* Total Citation Counts Rankings
Rankings
503,907
156,740
1,258
Ranking Based On Selection: 14
Michael B Fisher
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,691
922
0.545
Environmental Engineering
Environmental Microbiology
Water Quality
Sanitation
Monitoring and Evaluation
* Total Citation Counts Rankings
Rankings
513,787
159,326
1,272
Ranking Based On Selection: 15
Yunjia Lai
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,642
1,461
0.890
* Total Citation Counts Rankings
Rankings
530,909
163,846
1,307
Ranking Based On Selection: 16
Harrison B Zeff
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,561
1,053
0.675
Water Resource Managment
Environmental Financial Risk
Coupled Human and Natural Systems
* Total Citation Counts Rankings
Rankings
531,154
163,904
1,308
Ranking Based On Selection: 17
Zachariah Adelman
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,560
776
0.497
Air Pollution Modeling
* Total Citation Counts Rankings
Rankings
543,167
167,066
1,323
Ranking Based On Selection: 18
Kyle Onda
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,506
678
0.450
Water
Sanitation
Urban Planning
Infrastructure Sustainability
Hydroinformatics
* Total Citation Counts Rankings
Rankings
675,446
200,839
1,518
Ranking Based On Selection: 19
Karen Setty
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,036
569
0.549
environmental science
water quality
risk management
implementation science
systematic review
* Total Citation Counts Rankings
Rankings
761,256
221,226
1,628
Ranking Based On Selection: 20
Ashley R Williams
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
815
637
0.782
Environmental Engineering
Water
Sanitation
and Hygiene
* Total Citation Counts Rankings
Rankings
816,915
233,573
1,712
Ranking Based On Selection: 21
Lydia Abebe
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
694
422
0.608
* Total Citation Counts Rankings
Rankings
1,313,794
313,352
1,999
Ranking Based On Selection: 22
Amanda Lai
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
200
180
0.900
environmental engineering
environmental health
enteric pathogens
antimicrobial resistance
gut health
* Total Citation Counts Rankings
Rankings
1,473,346
334,915
2,092
Ranking Based On Selection: 23
Muoghalu Chimdi Catherine
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
138
135
0.978
Environmental Engineering
Sanitation Engineering
Public Health Engineering
* Total Citation Counts Rankings
Rankings
1,562,859
347,072
2,128
Ranking Based On Selection: 24
Alexis Payton
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
111
111
1.000
Environmental Sciences & Engineering
Public Health
Computational Toxicology
Machine Learning
* Total Citation Counts Rankings
Rankings
1,692,133
364,706
2,193
Ranking Based On Selection: 25
Faye Koenigsmark
University of North Carolina Chapel Hill
Chapel Hill, United States
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
80
64
0.800
environmental engineering
environmental epidemiology
risk assessment
health disparities