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| CHEEC > Research > Archives Past CHEEC Research: Funded Research and Data Management Projects Funded Research and Data Management Projects MDSTARNet: Go to the CDC website for further information: http://www.cdc.gov/ncbddd/duchenne/mdstarnet.htm Download a pdf brochure: mdstarnet.pdf CARHI Comprehensive Assessment of Rural Health in Iowa (CARHI)—NCEH is funding and providing technical oversight to a 2- to 3-year cooperative surveillance activity that is generating baseline health data for selected rural communities in Iowa. With input from a CARHI committee of stakeholders, the Iowa Department of Public Health (IDPH) is linking environmental and health data from a rural community to allow investigation of health effects possibly associated with the environment, such as effects associated with agricultural exposures. The CARHI committee is developing a tool and process for collecting data and a CARHI database. The committee also is recruiting communities and health care practitioners to participate in the CARHI project. Public health officials will use CARHI data to monitor communities’ health, identify existing or emerging health problems that warrant further investigation, enhance or guide environmental sampling, conduct comprehensive health studies, or target important public health programs such as smoking cessation and safe farming practices. Agricultural Health Study Naturally Occurring Ammonia in Drinking Water Wells Portions of the report submitted to the Iowa Department of Natural Resources are available at http://www.cheec.uiowa.edu/research/ammonia_report.doc . (Note: this report is a Microsoft Word Document). Residential Radon and Lung Cancer Case-Control Study Mammography Surveillance Pilot Studies One Time Testing of Iowa Regulated Drinking Water Supplies Eight hundred and fifty-six public water systems were tested. One hundred and twenty-five tested positive for one or more pesticides. Five hundred and fifty tested positive for one or more synthetic organic compounds. No measurable concentrations of pesticides or volatile organic chemicals were found in 279 systems. A few water systems had pesticides or volatile organic chemical levels that exceeded U.S. Environmental Protection Agency health advisories or maximum contaminant levels, but contaminant levels high enough to cause an acute health risk were not observed in this study. The pesticides most commonly found were atrazine, cyanazine (Bladex), alachlor (Lasso), metolachlor (Dual), and 2,4-D. The most frequently found volatile organic chemicals belong to a group called trihalomethanes (THMs). THMs are formed during disinfection when chlorine reacts with organic matter in the water. Para- and meta-xylene, measured as a single compound, was the second most abundant VOC observed. The following are the most significant findings of this one time testing:
For a copy of this report, contact the University Hygienic Laboratory at (319)335-4500. Fate of Endocrine Disruptors, Antibiotics and Pharmaceuticals in Wastewater Treatment Plants (2004) Biosolids are generally defined as the end-product of production and treatment of sludges generated during wastewater treatment. Beneficial uses of biosolids (e.g., land application, landfill covers, etc.) are expected to increase in the coming years. Wastewaters from domestic and industrial sources are known to contain relatively low concentrations of endocrine disruptors, antibiotics and pharmaceuticals. Most of what is known about the fate of these compounds comes from measurements taken before and after treatment of the liquid component of the wastewater. Very little is known about the fate of these compounds during processing of the solids generated during wastewater treatment. Many of these compounds are likely to partition onto particulate matter due to their hydrophobic nature. Thus, it is important to understand the fate of these compounds during the production and use of biosolids. Aqueous samples collected at points throughout a wastewater treatment plant were processed and analyzed for acetaminophen, caffeine, cotinine, ibuprofen, 4-nonylphenol, sulfamethoxazole, triclosan, and trimethoprim. Most aqueous phase removal occurred during primary clarification and/or activated sludge treatment while little or no aqueous phase removal resulted from secondary clarification or chlorination/dechlorination. Sorption isotherms determined for each compound on biosolids from the plant indicated compound specific sorption behavior. Caffeine, cotinine and acetaminophen were significantly removed from the aqueous phase during activated sludge treatment. This implicates biotransformation as a primary removal process given the low sorption potential of these chemicals. Sulfamethoxazole and trimethoprim also have low sorption potential, but are more chemically stabile such that only a small quantity of each was removed during activated sludge treatment. Ibuprofen, 4-nonylphenol and triclosan were significantly removed from the aqueous phase during activated sludge treatment, likely as a result of sorption processes as evidenced by high log Kow values and high concentrations of triclosan and 4-nonylphenol in analyzed biosolids. Urinary Pesticide Metabolite Levels and Reproductive Effects: A Prospective, Pilot Study of Partners of Pregnant Women in Iowa (2003) This study hypothesized that the variance in semen quality between geographic locations may be related to recent exposure to environmental toxins, particularly agricultural chemicals. Prospective, multi-center studies have demonstrated geographical variations in semen quality. A recent study of semen quality in four US cities found male partners of pregnant women a rural center (MO) to have significantly lower sperm counts and motility than men recruited from urban centers (NY, MN and CA). A small study of men from this population residing in MO demonstrated an association between semen quality and levels of urinary pesticide metabolites, while men in MN had few detectable levels. The study proposed to examine the relationship between semen quality and urinary pesticide metabolites in partners of pregnant women receiving obstetrical care at University of Iowa Hospitals and Clinics. Iowa Community Private Well Study (2002) Conducted from June 2002-January 2003, the study aimed to achieve a better understanding of private drinking water wells in incorporated Iowa towns not served by a public water supply system. Water samples were analyzed by the University of Iowa Hygienic Laboratory (duplicate samples analyzed at USGS laboratories) for common use pesticides, nitrogen compounds, inorganics, bacteria, and VOCs. The study design contained a random and focused component. * Random Study Methodology: Approximately 103 drinking water wells from towns that did not have a public water supply were selected. A weighted distribution of households from US Census data was employed to select wells (i.e.- towns with a higher number of households stood a greater chance of having a well selected). County environmental health specialists visited these towns, located randomly generated points on maps, and found the nearest building to draw a water sample. Fifty distinct towns had one or more wells sampled. * Focus Study Methodology: The focus study employed the use of existing databases of potential contamination sources to intensively sample 15 communities. Selection criteria for these towns considered: towns utilizing private septic systems, existence of underground storage tanks, location of agricultural grain and chemical storage dealerships, regional hydrogeology, active and closed landfills, feedlots, railroad systems, industries in violation of wastewater permit applications (including stormwater permits), nearby uncontrolled sites identified by the Iowa Department of Natural Resources (IDNR), and Resource Conservation and Recovery Act (RCRA)/Superfund sites. www.cheec.uiowa.edu/private_well/index.htm A fact sheet in PDF is available here: http://www.cheec.uiowa.edu/research/prv_well.pdf Analysis of Environmental Exposures in Hoop Structures and Conventional Confinement Swine Barns (1999) A major health concern in swine farming is inhalation of toxicants, which may lead to significant morbidity among swine farmers. Exposures to hydrogen sulfide, ammonia, dust and endotoxin have been linked to a number of health problems in workers, including upper airway diseases, lower airway diseases and interstitial diseases. In addition, outdoor air quality in proximity to swine operations has become a major concern in recent years. Neighbor complaints have been increasing as swine units become larger and more densely located in the neighboring community. While health effects related to odors from livestock units are very difficult to determine, the public perception that odors contain toxic substances has resulted in reports of headaches, nausea and other health complaints in neighbors. In recent years, hoop structures have emerged as an alternative method of housing hogs, and appear to have environmental benefits (related to air and water quality) in comparison to conventional confinement facilities. The purposes of this study are to 1) quantify airborne contaminant concentrations and exposure duration in hoop barns and conventional confinement barns controlling for location, season, micrometeorological conditions, animal density and other factors, and 2) to compare the exposure of airborne contaminants around and downwind of hoop structures and conventional confinement structures. The study will be conducted utilizing a pork producing farm with 3-5 hoop barns and 3-5 confinement buildings on a nearby site. The 15-month project will be a joint effort of researchers from The University of Iowa and Iowa State University; field sampling will be coordinated between study staffs, and laboratory analyses will be conducted utilizing labs at both institutions (ISU Odor Laboratory, ISU Animal Science Department, UI Inhalation Toxicology Facility), which specialize in specific contaminant identification and quantification. Antibiotics in Surface Water (1999) In 1999, CHEEC and the Iowa District of the United States Geological Survey (USGS) joined in a collaboratively funded project investigating the presence of antibiotics/antimicrobials in Iowa surface waters. The study objectives are to provide baseline data for types of antimicrobial compounds present, concentrations, and geographical distribution. Thirty sites from across the state were selected representing a cross section of large and small watersheds and stream flows. Of secondary importance of this study was for laboratory methods development for detection of these compounds. Thirty-one sites from across the state were sampled, representing large and small stream flows. Streams were sampled once during the first peak runoff event following snow melt in April 1999. These 15 distinct antibiotics were sampled: carbadox, spectinomycin, sulfamethoxazol, erythromycin, sulfamethazine, trimethoprin, erythromycin - H2O, sulfachloropyrizadine, tylosin, ivermectin, sulfadimethoxine, virginiamycin, lincomycin, sulfamerazine, and tetracyclines (total). Analytical results show that 16 of the 31 stream samples had positive detections for antibiotics. Sulfamethazine was detected in 10 samples, tetracycline (total) in 6, and lincomycin in 1. One stream had two detections of a single compound. All of the concentrations were below .5 micrograms/L (parts per billion). The results of this work were first presented at a 1999 USGS meeting titled Effects of Animal Feeding Operations on Hydrologic Resources and the Environment. Proceedings are available at http://water.usgs.gov/owq/AFO/proceedings/afo/index.html . Findings from this initial reconnaissance laid the groundwork for the the Kolpin et al journal article in Environmental Science and Technology, titled Pharmaceuticals, Hormones, and Other Organic Wastewater Contaminants in U.S. Streams, 1999-2000: A National Reconnaissance; Environ. Sci. Technol., 36 (6), 1202 -1211, 2002 For a more thorough discussion of emerging contamination of water sources, see the USGS Toxic Substances Hydrology Program . |
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