World's Best Scientists 2026 revealed!
Award Badge
Environmental Sciences
Australia
2023

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 77 1137 1079 51 49 279 21180
Microbiology 67 2258 2062 79 76 210 17511

Nicholas J. Ashbolt publications per year

The chart shows the history of publications by Nicholas J. Ashbolt between 1982 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Nicholas J. Ashbolt published across 45 years, from 1982 to 2026, averaging 6.7 papers a year. Output peaked at 20 publications in 2019. 13 of the 302 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1982 to 2026. Vertical axis: number of publications, 0 to 20. Peak 20 publications in 2019. 1982: 1 publication 1983: 0 publications 1984: 0 publications 1985: 1 publication 1986: 0 publications 1987: 1 publication 1988: 0 publications 1989: 0 publications 1990: 2 publications 1991: 0 publications 1992: 0 publications 1993: 6 publications 1994: 3 publications 1995: 3 publications 1996: 1 publication 1997: 2 publications 1998: 3 publications 1999: 1 publication 2000: 5 publications 2001: 8 publications 2002: 11 publications 2003: 16 publications 2004: 18 publications 2005: 15 publications 2006: 9 publications 2007: 7 publications 2008: 5 publications 2009: 6 publications 2010: 8 publications 2011: 12 publications 2012: 7 publications 2013: 12 publications 2014: 19 publications 2015: 15 publications 2016: 13 publications 2017: 15 publications 2018: 8 publications 2019: 20 publications 2020: 9 publications 2021: 13 publications 2022: 7 publications 2023: 5 publications 2024: 2 publications 2025: 12 publications 2026: 1 publication
1982 2026

302 publications in total across all disciplines

View publications per year as a table
Nicholas J. Ashbolt: publications per year, 1982 to 2026
Year Publications
1982 1
1983 0
1984 0
1985 1
1986 0
1987 1
1988 0
1989 0
1990 2
1991 0
1992 0
1993 6
1994 3
1995 3
1996 1
1997 2
1998 3
1999 1
2000 5
2001 8
2002 11
2003 16
2004 18
2005 15
2006 9
2007 7
2008 5
2009 6
2010 8
2011 12
2012 7
2013 12
2014 19
2015 15
2016 13
2017 15
2018 8
2019 20
2020 9
2021 13
2022 7
2023 5
2024 2
2025 12
2026 1
Total 302
Download as CSV

Nicholas J. Ashbolt publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Nicholas J. Ashbolt sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 271–280 publications, is where this scientist sits. 41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 282 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 279 publications — 83rd percentile

83% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440
101–110 492
111–120 541
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155 279
281–290 130
291–300 127
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
Download as CSV

Nicholas J. Ashbolt D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Nicholas J. Ashbolt sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 77 D-Index, is where this scientist sits. 30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 198 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 20 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125 D-Index: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 77 D-Index — 89th percentile

89% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26
32 51
33 88
34 123
35 163
36 206
37 267
38 265
39 275
40 321
41 343
42 305
43 336
44 330
45 348
46 291
47 275
48 272
49 273
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60 77
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92
Download as CSV

Research.com Recognitions

  • 2023 - Research.com Environmental Sciences in Australia Leader Award

Overview

Nicholas J. Ashbolt is affiliated with the University of South Australia in Australia and has contributed extensively to research in environmental science and related fields. Their work spans several interconnected domains within environmental and health sciences, focusing notably on microbial contaminants, antibiotic resistance, and water quality.

The scientist's recent publications cover a range of topics and have appeared in prominent journals. Key papers include:

  • Toward a Universal Unit for Quantification of Antibiotic Resistance Genes in Environmental Samples, 2023, Environmental Science & Technology
  • Knowledge Gaps in the Understanding of Antimicrobial Resistance in Canada, 2021, Frontiers in Public Health
  • Tenets of a holistic approach to drinking water-associated pathogen research, management, and communication, 2021, Water Research
  • Validating and optimizing the method for molecular detection and quantification of SARS-CoV-2 in wastewater, 2021, The Science of The Total Environment
  • Characterization of water treatment-resistant and multidrug-resistant urinary pathogenic Escherichia coli in treated wastewater, 2020, Water Research

The frequent coauthors collaborating with Ashbolt include Rafik Dey, Amy Pruden, Kerry A. Hamilton, Rasha Maal-Bared, and Qiaozhi Li. The consistent collaboration with these researchers indicates a network centered on environmental microbiology, water research, and public health microbiology.

Ashbolt has published regularly in several scientific venues, with notable repetition in:

  • Water Research
  • Journal of Water and Health
  • ACS ES&T Water
  • Environmental Science & Technology
  • The Science of The Total Environment

The academic fields covered by Ashbolt's research primarily focus on:

  • Environmental Science
  • Biochemistry, Genetics and Molecular Biology
  • Medicine

The subfields of study span:

  • Endocrinology
  • Infectious Diseases
  • Water Science and Technology
  • Pollution
  • Health, Toxicology and Mutagenesis

Ashbolt's research concentrates on several main topics, reflecting a multidisciplinary approach:

  • Legionella and Acanthamoeba research
  • Fecal contamination and water quality
  • SARS-CoV-2 detection and testing
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Water Treatment and Disinfection
  • Antibiotic Resistance in Bacteria
  • Vibrio bacteria research studies

Best Publications

  • Microbial contamination of drinking water and disease outcomes in developing regions.

    Nicholas John Ashbolt

  • Survival of fecal microorganisms in marine and freshwater sediments.

    C. M. Davies;J. A. H. Long;M. Donald;N. J. Ashbolt

  • Human Health Risk Assessment (HHRA) for environmental development and transfer of antibiotic resistance.

    Nicholas J. Ashbolt;Alejandro Amézquita;Thomas Backhaus;Peter Borriello

  • Indicators of microbial water quality

    Nicholas J. Ashbolt;Willie O.K. Grabow;Mario Snozzi

  • Using faecal sterols from humans and animals to distinguish faecal pollution in receiving waters

    R. Leeming;A. Ball;N. Ashbolt;P. Nichols

  • Estimated human health risks from exposure to recreational waters impacted by human and non-human sources of faecal contamination.

    Jeffrey A. Soller;Mary E. Schoen;Timothy Bartrand;John E. Ravenscroft

  • Guidelines for the safe use of wastewater, excreta and greywater

    A. C. Chang;Genxing Pan;Takashi Asano;Stephanie Buechler

  • Fate and Transport of Surface Water Pathogens in Watersheds

    Christobel Ferguson;Ana Maria de Roda Husman;Nanda Altavilla;Daniel Deere

  • Microbial Contamination of Drinking Water and Human Health from Community Water Systems

    Nicholas J. Ashbolt

  • Relationships between indicators, pathogens and water quality in an estuarine system

    C.M. Ferguson;B.G. Coote;N.J. Ashbolt;I.M. Stevenson

  • The role of biofilms and protozoa in Legionella pathogenesis: implications for drinking water.

    H.Y. Lau;N.J. Ashbolt

  • Fate and transport of pathogens in lakes and reservoirs.

    Justin D. Brookes;Jason Antenucci;Matthew Hipsey;Michael D. Burch

  • Do Free-Living Amoebae in Treated Drinking Water Systems Present an Emerging Health Risk?

    Jacqueline M. Thomas;Nicholas J. Ashbolt

  • A sea change ahead for recreational water quality criteria

    Alexandria B. Boehm;Nicholas J. Ashbolt;John M. Colford;Lee E. Dunbar

  • Estimating the primary etiologic agents in recreational freshwaters impacted by human sources of faecal contamination.

    Jeffrey A. Soller;Timothy Bartrand;Nicholas J. Ashbolt;John Ravenscroft

  • Assessing Pathogen Risk to Swimmers at Non-Sewage Impacted Recreational Beaches

    Mary E Schoen;Nicholas J Ashbolt

  • Functional microbial diversity explains groundwater chemistry in a pristine aquifer

    Theodore M Flynn;Theodore M Flynn;Robert A Sanford;Hodon Ryu;Craig M Bethke

  • The efficacy of heat and chlorine treatment against thermotolerant Acanthamoebae and Legionellae.

    Michael V. Storey;Jadwiga Winiecka-krusnell;Nicholas J. Ashbolt;Thor-axel Stenström

  • Microbial risks from wastewater irrigation of salad crops: a screening-level risk assessment.

    S. R. Petterson;N. J. Ashbolt;A. Sharma

  • Bacteriophages as indicators of faecal pollution and enteric virus removal.

    Brian R. McMinn;Nicholas J. Ashbolt;Asja Korajkic

  • Risk analysis of drinking water microbial contamination versus disinfection by-products (DBPs).

    Nicholas John Ashbolt

Frequent Co-Authors

Jorge W. Santo Domingo
Jorge W. Santo Domingo Environmental Protection Agency
Yang Liu
Yang Liu University of Alberta
Gregory Peters
Gregory Peters Chalmers University of Technology
Jay L. Garland
Jay L. Garland Environmental Protection Agency
Richard M. Stuetz
Richard M. Stuetz University of New South Wales
Keith L. Williams
Keith L. Williams Macquarie University
Stuart J. Khan
Stuart J. Khan University of Sydney
Amy Pruden
Amy Pruden Virginia Tech
Orin C. Shanks
Orin C. Shanks Environmental Protection Agency
Peter L. Rogers
Peter L. Rogers University of New South Wales

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

For students interested in Environmental Sciences, exploring related online degrees can broaden career opportunities and provide flexible learning options. Many professionals in the field also pursue interdisciplinary programs to enhance their expertise. For instance, some may consider fully funded dsw programs online to integrate community and environmental social work aspects.

If budget is a concern, there are budget friendly online general studies degree programs that offer foundational knowledge and transferable credits, serving as a stepping stone into specialized environmental science areas.

For those looking to complete their degrees with manageable coursework, some of the easy bachelor degrees may include options that still relate to environmental studies or natural sciences, allowing for a smoother academic path without compromising relevance.

Additionally, a popular choice closely aligned with Environmental Sciences is obtaining an online geology degrees. These programs provide critical insight into earth processes, essential for environmental research and careers such as conservation, resource management, and environmental consulting.

Best Scientists Citing Nicholas J. Ashbolt

Trending Scientists

Recently Published Articles