Dana W Kolpin
Dana Kolpin is a Research Hydrologist, with the Central Midwest Water Science Center in Iowa City, Iowa. Dana started his career with the USGS in 1984. His research interests include the fate, transport, and effects of environmental contaminants (e.g. pesticides, human and veterinary pharmaceuticals, hormones, etc.) in the environment.
Dana was the project lead of the USGS Toxic Program’s CECs in the Environment Project for its entire history (1998 – 2017). He is now project lead of the USGS Toxic Program’s newly formed Food Project (i.e. understanding the potential for health risks from contaminant exposures associated with production, manufacturing, use, and consumption of food, beverage, and feedstock products). He has published over 200 papers and reports on environmental contaminants. His paper "Pharmaceuticals, hormones, and other organic wastewater contaminants in U.S. streams, 1999-2000: A national reconnaissance" was a seminal paper on the occurrence of CECs in water resources, and was the first national-scale study of such compounds conducted in the United States. This paper has become the most heavily cited paper in Environmental Science & Technology history. He has published a diverse array of papers on the topic of environmental contaminants including research on CECs in landfills, changes in stream water chemistry and hydrology related to the closure of a wastewater treatment plant, detection of swine hepatitis E virus in streams, the transport of neonicotinoid insecticides in streams, the uptake of CECs into earthworms and into fish neural tissue, the occurrence of natural toxins (i.e. phytoestrogens and mycotoxins) in streams, and the first ever documentation of the off-field transport on nitrapyrin and herbicide safeners to streams. His most recent research interests include linking tap water quality to human health end points, investigating PFAS exposures in rural settings, determining the prevalence of antibiotic resistance genes in the environment, and understanding chemical and microbial contaminants being discharged into the environment by food and feedstock processing plants.
Education and Certifications
M.S., Geology, University of Iowa, Iowa City, Iowa
B.S., Geology, Iowa State University, Ames, Iowa
Science and Products
Source and transport of desethylatrazine and desisopropylatrazine to groundwater of the midwestern United States
Degradation of chloroacetanilide herbicides: The prevalence of sulfonic and oxanilic acid metabolites in Iowa groundwaters and surface waters
The environmental occurrence of herbicides: The importance of degradates in ground water
Pesticides and volatile organic compounds in shallow urban groundwater
Pesticides and volatile organic compounds in shallow urban groundwater of the United States
Analysis of environmental data with censored observations
Agricultural chemicals in groundwater of the midwestern United States: Relations to land use
Occurrence of selected herbicides and herbicide degradation products in Iowa's Ground Water, 1995
Temporal trends of selected agricultural chemicals in Iowa's groundwater, 1982-1995: Are things getting better?
Analysis of nitrate in near-surface aquifers in the midcontinental United States: An application of the inverse hyperbolic sine Tobit model
Water-quality data for nutrients, pesticides, and volatile organic compounds in near-surface aquifers of the midcontinental United States, 1992-1994
Atrazine concentrations in near-surface aquifers: A censored regression approach
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Source and transport of desethylatrazine and desisopropylatrazine to groundwater of the midwestern United States
Based on usage of the parent compounds and studies of their dissipation in corn fields, atrazine (6-chloro-N-ethyl-N'-(1-methylethyl-1,3,5-triazine-2,4-diamine)), cyanazine (2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropionitrile), and simazine (6-chloro-N,N'diethyl-1,3,5-triazine-2,4-diamine) are thought to be the important contributors of desethylatrazine (6-chloro-N-(1-methyAuthorsE. M. Thurman, D.W. Kolpin, D. A. Goolsby, M. T. MeyerDegradation of chloroacetanilide herbicides: The prevalence of sulfonic and oxanilic acid metabolites in Iowa groundwaters and surface waters
Water samples were collected from 88 municipal wells throughout Iowa during the summer and were collected monthly at 12 stream sites in eastern Iowa from March to December 1996 to study the occurrence of the sulfonic and oxanilic metabolites of acetochlor, alachlor, and metolachlor. The sulfonic and oxanilic metabolites were present in almost 75% of the groundwater samples and were generally preseAuthorsStephen J. Kalkhoff, Dana W. Kolpin, E. M. Thurman, I. Ferrer, D. BarceloThe environmental occurrence of herbicides: The importance of degradates in ground water
Numerous studies are being conducted to investigate the occurrence, fate, and effects on human health and the environment from the extensive worldwide use of herbicides to control weeds. Few studies, however, are considering the degradates of these herbicides in their investigations. Our study of herbicides in aquifers across Iowa found herbicide degradates to be prevalent in ground water, being dAuthorsD.W. Kolpin, E. M. Thurman, S. M. LinhartPesticides and volatile organic compounds in shallow urban groundwater
No abstract available.AuthorsD.W. Kolpin, P. J. Squillace, J.E. Barbash, J.S. ZogorskiPesticides and volatile organic compounds in shallow urban groundwater of the United States
The widespread use of pesticides and volatile organic compounds (VOCs) over the past half century has led to their detection in many hydrologic systems in the United States. However, few systematic investigations of occurrences have been carried out over multistate regions using a consistent study design. Nine urban studies of shallow groundwater have been conducted to date as part of the U.S. GeoAuthorsDana W. Kolpin, Paul J. Squillace, John S. Zogorski, Jack E. BarbashAnalysis of environmental data with censored observations
The potential threats to humans and to terrestrial and aquatic ecosystems from environmental contamination could depend on the sum of the concentrations of different chemicals. However, direct summation of environmental data is not generally feasible because it is common for some chemical concentrations to be recorded as being below the analytical reporting limit. This creates special problems inAuthorsS. Liu, J.-C. Lu, D.W. Kolpin, W.Q. MeekerAgricultural chemicals in groundwater of the midwestern United States: Relations to land use
To determine the relations between land use and concentrations of selected agricultural chemicals (nitrate, atrazine residue [atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) + deethylatrazinc (2-amino-4-chloro-6-isopropylamino-s-triazine) + deisopropylatrazine (2-amino-4-chloro-6-ethylamino-s-triazine)], and alachlor residue [alachlor, [2-chloro-2′,6′-diethyl-N-(methoxymethyl) acetaniAuthorsD.W. KolpinOccurrence of selected herbicides and herbicide degradation products in Iowa's Ground Water, 1995
Herbicide compounds were prevalent in ground water across Iowa, being detected in 70% of the 106 municipal wells sampled during the summer of 1995. Herbicide degradation products were three of the four most frequently detected compounds for this study. The degradation product alachlor ethanesulfonic acid was the most frequently detected compound (65.1%), followed by atrazine (40.6%), and the degraAuthorsD.W. Kolpin, S. J. Kalkhoff, D. A. Goolsby, D. A. Sneck-Fahrer, E. M. ThurmanTemporal trends of selected agricultural chemicals in Iowa's groundwater, 1982-1995: Are things getting better?
Since 1982, the Iowa Groundwater Monitoring (IGWM) Program has been used to sample untreated groundwater from Iowa municipal wells for selected agricultural chemicals. This long-term database was used to determine if concentrations of select agricultural chemicals in groundwater have changed with time. Nitrate, alachlor [2-chloro-2′-6′-diethyl-N-(methoxymethyl)-acetanilide], atrazine (2-chloro-4-eAuthorsD.W. Kolpin, D. Sneck-Fahrer, G.R. Hallberg, R.D. LibraAnalysis of nitrate in near-surface aquifers in the midcontinental United States: An application of the inverse hyperbolic sine Tobit model
A nonnormal and heteroscedastic Tobit model is used to determine the primary factors that affect nitrate concentrations in near-surface aquifers, using data from the U.S. Geological Survey collected in 1991. Both normality and homoscedasticity of errors are rejected, justifying the use of a nonnormal and heteroscedastic model. The following factors are found to have significant impacts on nitrateAuthorsSteven T. Yen, Shiping Liu, Dana W. KolpinWater-quality data for nutrients, pesticides, and volatile organic compounds in near-surface aquifers of the midcontinental United States, 1992-1994
Water samples were collected from 175 wells in 12 Midcontinental States (Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, Wisconsin) from 1992 through 1994 to determine the spatial distribution of nutrients, pesticides, and volatile organic compounds in ground water, and to document the potential effects of the historic flooding that occurAuthorsD.W. Kolpin, K.E. Zichelle, E. M. ThurmanAtrazine concentrations in near-surface aquifers: A censored regression approach
In 1991, the U.S. Geological Survey (USGS) conducted a study to investigate the occurrence of atrazine (2-chloro-4-ethylamino-6- isopropylamino-s-triazine) and other agricultural chemicals in near-surface aquifers in the midcontinental USA. Because about 83% of the atrazine concentrations from the USGS study were censored, standard statistical estimation procedures could not be used. To determineAuthorsS. Liu, S.T. Yen, D.W. Kolpin - News