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#           Methods used for the collection and analysis of chemical and biological data for the Tapwater Exposure Study, United States, 2016–17      

      November 1, 2018    

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In 2016, the U.S. Geological Survey (USGS) Environmental Health Mission Area, initiated the Tapwater Exposure Study as part of an infrastructure project to assess human exposure to potential threats from complex mixtures of contaminants. In the pilot phase (2016), samples were collected from 11 States throughout the United States, and in the second phase (2017), the study focused on the Greater Chicago area, including North and South Chicago, Illinois, and East Chicago, Indiana. Residential tapwater samples were collected at private residences during both phases, and during the first phase, samples were collected from Federal office buildings and from one office 19-liter water-bottle source. During the second phase, raw intake and treated (pre-distributional) water samples also were collected from four drinking-water treatment facilities in the Greater Chicago area. Samples were sent to laboratories at the USGS, U.S. Environmental Protection Agency, National Institute of Environmental Health Sciences, and Colorado School of Mines Center for Environmental Risk Assessment, for potential drinking-water pathogens, chemical, and bioassay analyses. These analyses included more than 400 chemicals such as trace elements, steroid hormones, pharmaceuticals, volatile organic compounds, pesticides, per- and polyfluorinated alkyl substances, cyanotoxins, and other organic compounds. The in vitro bioassay analyses included estrogen, androgen, and glucocorticoid receptor activity.

## Citation Information

## Related Content

                  -              Data           
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November 6, 2018

####                 Occurrence and Concentrations of Trace Elements in Discrete Tapwater Samples Collected in Chicago, Illinois and East Chicago, Indiana, 2017              

Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, South Atlantic Water Science Center (SAWSC)

November 6, 2018

####                 Target-Chemical Concentrations, Exposure Activity Ratios, and Bioassay Results for Assessment of Mixed-Organic/Inorganic-Chemical Exposure in USA Tapwater, 2016              

Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, South Atlantic Water Science Center (SAWSC)

#### Kristin Romanok

##### Hydrologist

New Jersey Water Science Center

kromanok@usgs.gov

609-771-3952

#### Dana W Kolpin

##### Research Hydrologist

Central Midwest Water Science Center

dwkolpin@usgs.gov

319-358-3614

#### Shannon M Meppelink

##### Physical Scientist

Central Midwest Water Science Center

smeppelink@usgs.gov

319-358-3659

#### Julie E Dietze

##### Physical Scientist 

Kansas Water Science Center

juliec@usgs.gov

785-832-3564

#### Carrie E Givens, PhD

##### Supervisory Hydrologist

Upper Midwest Water Science Center

cgivens@usgs.gov

517-887-8933

#### James L Gray, PhD

##### Research Chemist

Water Resources Mission Area

jlgray@usgs.gov

303-236-3776

#### Michelle L Hladik, PhD

##### Research Chemist

California Water Science Center

mhladik@usgs.gov

916-278-3183

####             Luke R Iwanowicz, Ph.D. (Former Employee)          

##### Research Biologist

Eastern Ecological Science Center

#### Keith A Loftin, Ph.D.

##### Research Chemist

Kansas Water Science Center

kloftin@usgs.gov

785-832-3543

#### R. Blaine McCleskey

##### Research Chemist

Water Resources Mission Area

rbmccles@usgs.gov

303-541-3071

#### Paul M Bradley

##### Research Ecologist/Hydrologist

South Atlantic Water Science Center (SAWSC)

pbradley@usgs.gov

## Related Content

November 6, 2018

####                 Occurrence and Concentrations of Trace Elements in Discrete Tapwater Samples Collected in Chicago, Illinois and East Chicago, Indiana, 2017              

Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, South Atlantic Water Science Center (SAWSC)

November 6, 2018

####                 Target-Chemical Concentrations, Exposure Activity Ratios, and Bioassay Results for Assessment of Mixed-Organic/Inorganic-Chemical Exposure in USA Tapwater, 2016              

Contaminant Biology, Environmental Health Program, Toxic Substances Hydrology, South Atlantic Water Science Center (SAWSC)

#### Kristin Romanok

##### Hydrologist

New Jersey Water Science Center

kromanok@usgs.gov

609-771-3952

#### Dana W Kolpin

##### Research Hydrologist

Central Midwest Water Science Center

dwkolpin@usgs.gov

319-358-3614

#### Shannon M Meppelink

##### Physical Scientist

Central Midwest Water Science Center

smeppelink@usgs.gov

319-358-3659

#### Julie E Dietze

##### Physical Scientist 

Kansas Water Science Center

juliec@usgs.gov

785-832-3564

#### Carrie E Givens, PhD

##### Supervisory Hydrologist

Upper Midwest Water Science Center

cgivens@usgs.gov

517-887-8933

#### James L Gray, PhD

##### Research Chemist

Water Resources Mission Area

jlgray@usgs.gov

303-236-3776

#### Michelle L Hladik, PhD

##### Research Chemist

California Water Science Center

mhladik@usgs.gov

916-278-3183

####             Luke R Iwanowicz, Ph.D. (Former Employee)          

##### Research Biologist

Eastern Ecological Science Center

#### Keith A Loftin, Ph.D.

##### Research Chemist

Kansas Water Science Center

kloftin@usgs.gov

785-832-3543

#### R. Blaine McCleskey

##### Research Chemist

Water Resources Mission Area

rbmccles@usgs.gov

303-541-3071

#### Paul M Bradley

##### Research Ecologist/Hydrologist

South Atlantic Water Science Center (SAWSC)

pbradley@usgs.gov

### Contact

####             Water Resources Mission Area - Headquarters        

USGS Headquarters12201 Sunrise Valley DriveReston, VA20192United States

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