A5055770675- Water Quality and Resources Studies
- Toxic Organic Pollutants Impact
- Smart Materials for Construction
- Urban Stormwater Management Solutions
- Environmental Toxicology and Ecotoxicology
- Pharmaceutical and Antibiotic Environmental Impacts
- Fecal contamination and water quality
- Groundwater flow and contamination studies
- Soil and Water Nutrient Dynamics
- Microplastics and Plastic Pollution
- Hydrology and Watershed Management Studies
- Effects and risks of endocrine disrupting chemicals
- Water Treatment and Disinfection
- Icing and De-icing Technologies
- Fish Ecology and Management Studies
- Pesticide and Herbicide Environmental Studies
- Water Quality and Pollution Assessment
- Viral gastroenteritis research and epidemiology
- Hydrology and Sediment Transport Processes
- Animal Disease Management and Epidemiology
- Environmental Justice and Health Disparities
- Recycling and Waste Management Techniques
- Analytical Chemistry and Sensors
- Wastewater Treatment and Reuse
- Water Systems and Optimization
United States Geological Survey
2016-2025
Upper Midwest Water Science Center
2018-2024
Vrije Universiteit Amsterdam
2021
University of Wisconsin System
2008-2018
Wisconsin Department of Natural Resources
2005-2013
University of Maryland, College Park
2006
University of Wisconsin–Madison
2006
Oregon State University
2003
Marquette University
2003
Western Washington University
2003
Plastic debris is a growing contaminant of concern in freshwater environments, yet sources, transport, and fate remain unclear. This study characterized the quantity morphology floating micro- macroplastics 29 Great Lakes tributaries six states under different land covers, wastewater effluent contributions, population densities, hydrologic conditions. Tributaries were sampled three or four times each using 333 μm mesh neuston net. particles sorted by size, counted, categorized as...
Microplastic contamination was studied along a freshwater continuum from inland streams to the Milwaukee River estuary Lake Michigan and vertically water surface, subsurface, sediment. Microplastics were detected in all 96 samples 9 sediment collected. Results indicated gradient of polymer presence with depth: low-density particles decreased surface subsurface sediment, high-density had opposite result. Polymer identification results that dominated by polypropylene particles, more dense...
A new perspective on the severity of aquatic toxicity impact road salt was gained by a focused research effort directed at winter runoff periods. Dramatic impacts were observed local, regional, and national scales. Locally, samples from 7 13 Milwaukee, Wisconsin area streams exhibited in Ceriodaphnia dubia Pimephales promelas bioassays during road-salt runoff. Another Milwaukee stream sampled 1996 to 2008 with 72% 37 exhibiting chronic 43% acute bioassays. The maximum chloride concentration...
Chloride concentrations in northern U.S. included this study have increased substantially over time with average approximately doubling from 1990 to 2011, outpacing the rate of urbanization Historical data were examined for 30 monitoring sites on 19 streams that had chloride concentration and flow records 18 49 years. most studied all seasons (13 seasons; 16 during winter); maximum occurred winter. Increasing non-deicing periods suggest was stored hydrologic reservoirs, such as shallow...
Past studies have demonstrated an association between waterborne disease and heavy precipitation, climate change is predicted to increase the frequency of these types intense storm events in some parts United States. In this study, we examined linkage rainfall sewage contamination urban waterways quantified amount released from a major area under different hydrologic conditions identify that human risk exposure sewage.Rain low-flow periods were intensively sampled quantify loads based on two...
Organic compounds used in agriculture, industry, and households make their way into surface waters through runoff, leaking septic-conveyance systems, regulated unregulated discharges, combined sewer overflows, among other sources. Concentrations of these organic waste (OWCs) some Great Lakes tributaries indicate a high potential for adverse impacts on aquatic organisms. During 2010-13, 709 water samples were collected at 57 tributaries, together representing approximately 41% the total...
Current environmental monitoring approaches focus primarily on chemical occurrence. However, based concentration alone, it can be difficult to identify which compounds may of toxicological concern and should prioritized for further monitoring, in-depth testing, or management. This problematic because characterization is lacking many emerging contaminants. New sources high-throughput screening (HTS) data, such as the ToxCast database, contains information over 9000 screened through up 1100...
The spatial distribution, concentration, particle size, and polymer compositions of microplastics in Lake Michigan Erie sediment were investigated. Fibers/lines the most abundant five types characterized. Microplastic particles observed all samples with mean concentrations for greater than 0.355 mm 65.2 p kg–1 (n = 20) 431 12). Additional analysis size 0.1250–0.3549 resulted a concentration 631 kg–1. majority polymers poly(ethylene terephthalate) (PET), high-density polyethylene (HDPE),...
Chemical monitoring data were collected in surface waters from 57 Great Lakes tributaries 2010 to 13 identify chemicals of potential biological relevance and sites at which these occur. Traditional water-quality benchmarks for aquatic life based on vivo toxicity available 34 67 evaluated chemicals. To expand evaluation effects, measured chemical concentrations compared chemical-specific activities determined high-throughput (ToxCast) vitro assays. Resulting exposure-activity ratios (EARs)...
To examine the occurrence, hydrologic variability, and seasonal variability of human bovine viruses in surface water, three stream locations were monitored Milwaukee River watershed Wisconsin, USA, from February 2007 through June 2008. Monitoring sites included an urban subwatershed, a rural at mouth. collect samples that characterize throughout changing periods, process control system was developed for unattended, large-volume (56-2800 L) filtration over extended durations. This provided...
Safe drinking water at the point-of-use (tapwater, TW) is a United States public health priority. Multiple lines of evidence were used to evaluate potential human concerns 482 organics and 19 inorganics in TW from 13 (7 supply, 6 private well self-supply) home 12 (public supply) workplace locations 11 states. Only uranium (61.9 μg L–1, well) exceeded National Primary Drinking Water Regulation maximum contaminant level (MCL: 30 L–1). Lead was detected 23 samples (MCL goal: zero). Seventy-five...
Waterborne contaminants were monitored in 69 tributaries of the Laurentian Great Lakes 2010 and 2014 using semipermeable membrane devices (SPMDs) polar organic chemical integrative samplers (POCIS). A risk-based screening approach was used to prioritize chemicals mixtures, identify sites at greatest risk for biological impacts, potential hazards monitor those sites. Analyses included 185 (143 detected) including polycyclic aromatic hydrocarbons (PAHs), legacy current-use pesticides, fire...
Abstract Surface water concentrations of per- and polyfluoroalkyl substances (PFAS) potential for resulting biological effects were estimated in a study using Polar Organic Chemical Integrative Samplers (POCIS) from 60 tributary sites within 20 watersheds the Great Lakes Basin 2018. Sites represented range urban to agricultural, forested, wetland land uses included gradient wastewater treatment effluent zero 44% annual streamflow. Several also had airport influence. Twenty-one 32 targeted...
Aircraft anti-icers and pavement deicers improve the safety of airport operations during winter precipitation events. Runoff containing these products can contribute elevated biochemical oxygen demand (BOD) to receiving streams. We monitored runoff from Milwaukee Mitchell International Airport at one upstream site, three outfall sites, downstream site 2005 2022 for BOD, chemical (COD), freezing point depressants used in deicing anti-icing fluids determine primary sources BOD COD stream. The...
Abstract Ongoing anthropogenic activities and analytical advancements yield continuously expanding lists of environmental contaminants. This represents a challenge to managers, who must prioritize chemicals for management actions (e.g., restriction, regulation, remediation) but are often hindered by resource limitations. To help facilitate prioritization efforts, this study presents several strategies deriving hazard concentrations using publicly accessible data open-source computational...
Abstract The Great Lakes Restoration Initiative aims to protect and restore the nation’s largest freshwater resource, in part, by furthering our understanding of effects contaminants emerging concern (CECs) chemical mixtures on aquatic terrestrial organisms. To address this goal, an interagency team conducted field studies at sites along Maumee River Ohio, USA, 2016–2017, monitoring CEC levels with diverse vitro vivo biological ecologically relevant species (fathead minnows, tree swallows,...
High concentrations of polycyclic aromatic hydrocarbons (PAHs) in streams can be a significant stressor to aquatic organisms. To understand the likely sources and toxicity PAHs Milwaukee-area streams, streambed sediment samples from 40 sites parking lot dust 6 were analyzed for 38 parent 25 alkylated PAHs. Diagnostic ratios, profile correlations, principal components analysis, source-receptor modeling, mass fractions analysis used identify potential PAH samples, land-use was relate different...
Waterborne pathogens were measured at three beaches in Lake Michigan, environmental factors for predicting pathogen concentrations identified, and the risk of swimmer infection illness was estimated. detected 96% samples collected Michigan summer, 2010. Samples quantified 22 four microbial categories (human viruses, bovine protozoa, pathogenic bacteria). All had detections human viruses bacteria indicating influence multiple contamination sources these beaches. Occurrence ranged from 40 to...
Samples of nine different formulations aircraft deicer and antiicer fluids (ADAF) were screened for the presence selected surfactants. Nonylphenol ethoxylates (NPnEO) identified in three ADAF formulations, octylphenol two six contained alcohol ethoxylates. A preliminary field study was conducted at General Mitchell International Airport, Milwaukee, WI, to quantify NPnEO (n = 1−15) one its byproducts, nonylphenol (NP), airport runoff. collected from outfalls, receiving stream, an upstream...
This paper presents the results of a number field and laboratory studies to evaluate environmental impact aircraft deicing anti-icing fluids (ADAFs) on aquatic systems. Both 5-methyl-1H-benzotriazole (5-MeBt) 4-methyl-1H-benzotriazole (4-MeBt), known additives ADAFs, were found in whole-tissue extracts from minnows placed downstream an effluent outfall that receives ADAF contaminated runoff General Mitchell International Airport (Milwaukee, WI, USA). Neither these compounds was detected...
Snowbank samples were collected from snowbanks within a medium-sized airport for four years to characterize aircraft deicer and anti-icer (ADAF) components toxicity. Concentrations of ADAF varied with median glycol concentrations individual sampling periods ranging 65 5940 mg/L. Glycol content in ranged 0.17 11.4% that applied aircraft. Glycol, freezing point depressant, was selectively removed during melt before snow ice resulting lower after periods. runoff similar snowmelt as compared...