Abstract:
:Untreated wastewater from the Mexico City basin has been used for decades to irrigate cropland in the Mezquital Valley, State of Hidalgo, Mexico. Excess irrigation water recharges the near-surface aquifer that is used as a domestic water supply source. We assessed the groundwater quality of three key groundwater sources of domestic water by analyzing for 24 trace metals, 67 target base/neutral/acid (BNA) organic compounds, nontarget BNA organics, 23 chlorinated pesticides, 20 polychlorinated biphenyls, and nitrate, as well as microbiological contaminants--coliforms, Vibrio cholerae, and Salmonella. Study participants answered a questionnaire that estimated ingestion and dermal exposure to groundwater; 10% of the sample reported frequent diarrhea and 9% reported persistent skin irritations. Detection of V. cholerae non-01 in surface waters at all sites suggested a potential risk (surrogate indicator present) of diarrheal disease for canal and river bathers by accidental ingestion, as well as potential Vibrio contamination of near-surface groundwater and potential cholera risk, magnified by lapses in disinfection. High total coliform levels in surface water and lower levels in groundwater at all sites indicated fecal contamination and a potential risk of gastrointestinal disease in populations exposed to inadequately disinfected groundwater. Using chemical criteria, no significant risk from ingestion or dermal contact was identified at the method detection limits at any site, except from nitrate exposure: infants and young children are at risk from methemoglobinemia at all sites. Results suggest that pathogen risk interventions are a priority, whereas nitrate risk needs further characterization to determine if formal treatment is needed. The risks exist inside and outside the irrigation district. The method was highly cost-effective.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Downs TJ,Cifuentes-García E,Suffet IMdoi
10.1289/ehp.99107553subject
Has Abstractpub_date
1999-07-01 00:00:00pages
553-61issue
7eissn
0091-6765issn
1552-9924pii
sc271_5_1835journal_volume
107pub_type
杂志文章abstract:BACKGROUND:Previous research suggests perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) may be associated with adverse pregnancy outcomes. OBJECTIVE:We conducted a population-based study of PFOA and PFOS and birth outcomes from 2005 through 2010 in a Mid-Ohio Valley community exposed to high levels of...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1206372
更新日期:2013-10-01 00:00:00
abstract::Because of rampant concern that estrogenic chemicals in the environment may be adversely affecting the health of humans and wildlife, reliable methods for detecting and characterizing estrogenic chemicals are needed. It is important that general agreement be reached on which tests to use and that these tests then be a...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.961041296
更新日期:1996-12-01 00:00:00
abstract::The Centers for Disease Control and Prevention recommend that local public health agencies use local data to identify children at risk for lead exposure to ensure that they receive preventive services. The objective of this study was to demonstrate the usefulness of a geographic information system (GIS) in identifying...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0110989
更新日期:2001-01-01 00:00:00
abstract::Calcium has been implicated as a regulatory factor in many physiological and pathophysiological processes in the renal cell. Under physiological conditions, the cytosolic free calcium concentration is maintained at approximately 100 nM. Most of the releasable cell Ca2+ resides in the nonmitochondrial compartments. In ...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.9084155
更新日期:1990-03-01 00:00:00
abstract::Toxicity testing in AS52 cells (24-hr exposures) gave LC50 values of 2 to 130 micrograms Ni/ml for particulate nickel compounds and 45 to 60 micrograms Ni/ml for water-soluble salts (NiCl2, NiSO4, Ni(CH3COO)2). The Ni(OH)2, NiCO3, and sulfides (Ni3S2, Ni7S6, "amorphous NiS") exhibited similar toxicities (LC50's of 2 t...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102s369
更新日期:1994-09-01 00:00:00
abstract::This article provides an overview of methods for reliability assessment of quantitative structure-activity relationship (QSAR) models in the context of regulatory acceptance of human health and environmental QSARs. Useful diagnostic tools and data analytical approaches are highlighted and exemplified. Particular empha...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.5758
更新日期:2003-08-01 00:00:00
abstract::A review of the experimental studies relating boron to biological effects on appendicular and axial bones in animal models suggests that numerous influences, known and unknown, affect the responsiveness of bone to dietary boron. Degrees of skeletal response to boron are modified by other nutritional variables that inc...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.94102s749
更新日期:1994-11-01 00:00:00
abstract::Di(2-ethylhexyl) phthalate (DEHP) is used to make polyvinyl chloride (PVC) plastic tubing soft and flexible. Animal data show that adverse effects of DEHP exposure may include reduced fertility, reduced sperm production in males, and ovarian dysfunction in females. Known treatments that involve high DEHP exposures are...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6901
更新日期:2004-09-01 00:00:00
abstract::Chlordane is a polychlorinated hydrocarbon that causes liver enlargement and induces mixed-function oxidases similar to those induced by phenobarbitone in the mouse. We have assessed the hepatocarcinogenicity (after 2 years) and the time course (over 6 months) of liver and thyroid cell proliferation in C57Bl/10J mice ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.93101s5219
更新日期:1993-12-01 00:00:00
abstract::Many mammals methylate trivalent inorganic arsenic in liver to species that are released into the bloodstream and excreted in urine and feces. This study addresses how methylated arsenicals pass through cell membranes. We have previously shown that aquaglyceroporin channels, including Escherichia coli GlpF, Saccharomy...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8600
更新日期:2006-04-01 00:00:00
abstract::Epidemiological studies examining the association between exposure to tap water contaminants (such as chlorination by-products) and disease outcomes (such as cancer and adverse reproductive outcomes) have been limited by inaccurate exposure assessment. Failure to take into account the variation in beverage and tap wat...
journal_title:Environmental health perspectives
pub_type: 临床试验,杂志文章
doi:10.1289/ehp.9810655
更新日期:1998-02-01 00:00:00
abstract:BACKGROUND:Epidemiologic evidence links tobacco smoke and increased risk for influenza in humans, but the specific host defense pathways involved are unclear. OBJECTIVE:We developed a model to examine influenza-induced innate immune responses in humans and test the hypothesis that exposure to cigarette smoke alters na...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1002258
更新日期:2011-01-01 00:00:00
abstract::To set occupational exposure limits (OELs) for aerosol particles, dusts, or chemicals, one has to evaluate whether mechanistic considerations permit identification of a no observed effect level (NOEL). In the case of carcinogenic effects, this can be assumed if no genotoxicity is involved, and exposure is considered s...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.97105s51357
更新日期:1997-09-01 00:00:00
abstract:BACKGROUND:In the developing brain, serotonin (5HT) systems are among the most sensitive to disruption by organophosphates. OBJECTIVES:We exposed neonatal rats to daily doses of diazinon or parathion on postnatal days (PND)1-4 and evaluated 5HT receptors and the 5HT transporter in brainstem and forebrain on PND5, focu...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9337
更新日期:2006-10-01 00:00:00
abstract::Systemic lupus erythematosus and systemic scleroderma are autoimmune diseases thought to have an exogenous trigger. This review summarizes relevant case-control and cohort studies that investigated exogenous sex hormones, silica, silicone, solvents, pesticides, mercuric chloride, and hair dyes as putative risk factors...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.99107s5743
更新日期:1999-10-01 00:00:00
abstract:BACKGROUND:The Love Canal is a rectangular 16-acre, 10-ft deep chemical waste landfill situated in a residential neighborhood in Niagara Falls, New York. This seriously contaminated site first came to public attention in 1978. No studies have examined mortality in the former residents of the Love Canal neighborhood (LC...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11350
更新日期:2009-02-01 00:00:00
abstract:BACKGROUND:Organophosphate (OP) pesticides are widely used in agriculture and homes. Animal studies suggest that even moderate doses are neurodevelopmental toxicants, but there are few studies in humans. OBJECTIVES:We investigated the relationship of prenatal and child OP urinary metabolite levels with children's neur...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9828
更新日期:2007-05-01 00:00:00
abstract::Noise exposure causes changes at different levels in human organs, particularly the cardiovascular system, where it is responsible for increasing heart rate, peripheral vascular resistance, and blood pressure. In this study, we evaluated the effect of noise exposure on DNA integrity and ultrastructure of rat cardiomyo...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.5847
更新日期:2003-04-01 00:00:00
abstract::Pregnant rats were exposed by inhalation to vapor concentrations of 100, 200, 400 or 800 ppm of ethylene glycol monopropyl ether acetate on days 6 through 15 of gestation. Concentrations of 400 and 800 ppm reduced the feed intake, mean body weight and red blood cell counts. Mean corpuscular volume and mean corpuscular...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.845725
更新日期:1984-08-01 00:00:00
abstract::Germ-line mutations of the mouse have for years comprised one class of biological markers for mammalian reproductive and developmental toxicology. Understanding the molecular nature of mutations and the mechanisms by which mutations are translated into specific (and often complex) phenotypes, however, still looms as a...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.877441
更新日期:1987-10-01 00:00:00
abstract::Granular activated carbon (GAC), in the presence of dilute aqueous hypochlorite solutions typical of those used in water treatment, was converted to a reagent capable of carrying out free-radical coupling reactions and other oxidations of dilute aqueous solutions of phenols. The products included biphenyls with chlori...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.866997
更新日期:1986-11-01 00:00:00
abstract::Adults eating a Western diet digest and absorb ingested food containing approximately 100 g fat, 350 g carbohydrate, and 75 g protein daily. Normal fat absorption requires adequate gastric, pancreatic, liver-biliary, mucosal, and lymphatic function. Carbohydrate and protein absorption is much less dependent on liver-b...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7933101
更新日期:1979-12-01 00:00:00
abstract::Forty percent of hazardous waste sites in the United States are co-contaminated with organic and metal pollutants. Data from both aerobic and anaerobic systems demonstrate that biodegradation of the organic component can be reduced by metal toxicity. Metal bioavailability, determined primarily by medium composition/so...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.5840
更新日期:2003-06-01 00:00:00
abstract::The National Center for Health Statistics (NCHS) conducts a variety of surveys designed to provide cross-sectional estimates of the prevalence of various factors measuring the health of Americans. When these cross-sectional estimates are put together and plotted over time, they provide a picture of the trends in the h...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8562267
更新日期:1985-10-01 00:00:00
abstract::A major concern of the chlorination of aquatic humic materials is the ubiquitous production of trihalomethanes. A large number of other chlorinated organic compounds, however, have been shown to be formed by chlorine's reaction with humic substances. In this study, humic material was concentrated from a coastal North ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.824663
更新日期:1982-12-01 00:00:00
abstract::Following our first report on elevated polybrominated diphenyl ether (PBDE) concentrations in California women, we expanded our investigation to include diverse groups of local women. We analyzed additional adipose and serum samples collected in the late 1990s from San Francisco Bay Area women participating in a breas...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6220
更新日期:2003-07-01 00:00:00
abstract:BACKGROUND:In the 1990s, the mercury-based preservative thimerosal was used in most pediatric vaccines. Although there are currently only two thimerosal-containing vaccines (TCVs) recommended for pediatric use, parental perceptions that vaccines pose safety concerns are affecting vaccination rates, particularly in ligh...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408257
更新日期:2015-06-01 00:00:00
abstract::For workers in the nuclear industry, the primary route for the entry of radioactive materials into the body is by inhalation, and the rate of clearance of particles from the pulmonary region of the lung is an important factor in determining radiation dose. It is the function of alveolar macrophages (AM) to maintain th...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.929769
更新日期:1992-07-01 00:00:00
abstract:BACKGROUND:Despite experimental evidence, most epidemiologic studies to date have not supported an association between exposure to persistent organic pollutants (POP) and breast cancer incidence in humans. This may be attributable to difficulties in estimating blood/tissue POP concentration at critical time periods of ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.10917
更新日期:2008-07-01 00:00:00
abstract::In an attempt to elucidate the relationship between DNA adduct formation and tumorigenesis, DNA adducts were measured in the livers and bladders of mice during chronic exposure to several different doses of 2-acetylaminofluorene (2-AAF) and 4-aminobiphenyl (4-ABP). Continuous oral administration of these compounds for...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.94102s6161
更新日期:1994-10-01 00:00:00