Selected tag(s): SHEDS

New EPA model enables comparison of various sources of childhood exposure to lead

Tom Neltner, J.D.is Chemicals Policy Director and Dr. Ananya Roy is Health Scientist

This week, Environmental Health Perspectives published an important article by scientists at the Environmental Protection Agency (EPA) that sheds important light on the various sources of children’s lead exposure. Led by Valerie Zaltarian, the article shares an innovative multimedia model to quantify and compare relative contributions of lead from air, soil/dust, water and food to children’s blood lead level. The model couples existing SHEDS and IEUBK models to predict blood lead levels using information on concentrations of lead in different sources, intake and gut absorption. The predicted blood lead levels compared well with observed levels in the National Health and Nutrition Evaluation Survey population. Given the variety of independent sources of lead exposure, the model provides a critical tool that public health professionals can use to set priorities and evaluate the impact of various potential standards for all children and not just those with the greatest exposure.

This peer-reviewed article builds on a draft report EPA released in January 2017 evaluating different approaches to setting a health-based benchmark for lead in drinking water. The report has provided a wealth of insight into a complicated topic. Earlier this year, we used it to show that formula-fed infants get most of their lead exposure from water and toddlers from food, while the main source of lead for the highest exposed children is soil and dust. In our February blog, we provided our assessment of a health-based benchmark for lead in drinking water and explained how public health professionals could use it to evaluate homes. The information was also critical to identifying lead in food as an overlooked, but meaningful, source of children’s exposure to lead.

The new article reaffirms the analysis in the January 2017 EPA report and highlights that evaluating source contribution to blood lead in isolation versus aggregating across all sources can lead to very different answers and priorities. A health-based benchmark for lead in drinking water could vary from 0 to 46 ppb depending on age and whether all other sources of lead are considered. For example, a health-based benchmark for infants (birth to six months old) would be 4 ppb or 13 ppb depending on whether or not you consider all sources of exposure.

Read More »

Posted in Drinking Water, Emerging Science, EPA, Food, Health Policy, lead, Uncategorized| Also tagged , , , , , , , | Comments are closed
  • About this blog

    Science, health, and business experts at Environmental Defense Fund comment on chemical and nanotechnology issues of the day.
    Our work: Chemicals

  • Get new posts by email

    We'll deliver new blog posts to your inbox.

    Subscribe via RSS

  • Filter posts by tags

    • 6th Court of Appeals (1)
    • ADHD (1)
    • aggregate exposure (10)
    • Air Pollution (2)
    • Alternatives assessment (3)
    • American Chemistry Council (ACC) (57)
    • Ami Zota (1)
    • arsenic (3)
    • artificial colors (1)
    • asthma (4)
    • Australia (1)
    • baby food (1)
    • Baltimore (1)
    • Barley (1)
    • BBDR (1)
    • behavior (1)
    • Behind the Label (1)
    • benzophenone (1)
    • biomonitoring (9)
    • bipartisan (6)
    • bisphenol A (23)
    • Bleach (1)
    • blue (1)
    • bologna (2)
    • BP Oil Disaster (18)
    • BPA (2)
    • BPS (1)
    • Brain Development (1)
    • building code (1)
    • building code official (1)
    • California (3)
    • Canada (7)
    • carbon nanotubes (24)
    • carcinogen (22)
    • Carcinogenic Mutagenic or Toxic for Reproduction (CMR) (12)
    • Carrots (1)
    • CDC (9)
    • Center for Science in the Public Interest (1)
    • certified colors (1)
    • Chemical Assessment and Management Program (ChAMP) (13)
    • chemical exposure (3)
    • chemical identity (32)
    • chemical testing (4)
    • Chemicals Added to Food (1)
    • Chemicals in Commerce Act (3)
    • Chicago Tribune (6)
    • Children (1)
    • Children's health (2)
    • children's safety (24)
    • China (10)
    • chlorate (1)
    • CHPAC (1)
    • Cincinnati (2)
    • citizens petition (2)
    • Cleveland (1)
    • Climate change (1)
    • Clinton (1)
    • Collard Greens (1)
    • color (1)
    • color additive (1)
    • Compliance (1)
    • computational toxicology (11)
    • ConAgra (1)
    • Confidential Business Information (CBI) (61)
    • conflict of interest (9)
    • Congress (1)
    • Congressman Israel (1)
    • consumer products (52)
    • Consumer Specialty Products Association (CSPA) (4)
    • contamination (4)
    • CSPI (1)
    • cumulative exposure (4)
    • Dallas (1)
    • data requirements (47)
    • degradation (1)
    • DEHP (1)
    • Denver (1)
    • dermal exposure (1)
    • Design for Environment (1)
    • development (2)
    • developmental (1)
    • diabetes (4)
    • disclosure (3)
    • DNA methylation (4)
    • Dourson (19)
    • Drinking Water (14)
    • drinking wtaer (1)
    • dry food (1)
    • DuPont (11)
    • Durbin (1)
    • dust (1)
    • dust/soil (1)
    • endocrine (2)
    • endocrine disruption (31)
    • environmental justice (1)
    • EPA (15)
    • EPA scientists (1)
    • epigenetics (4)
    • exposure and hazard (49)
    • fast food (1)
    • FD&C (1)
    • FDA (20)
    • fees (1)
    • Firemaster (2)
    • First Trimester (1)
    • flame retardants (25)
    • Flint (1)
    • Food (3)
    • food additive (3)
    • food additive petition (2)
    • food additives (4)
    • Food Advisory Comittee (1)
    • food contact substances (1)
    • food dyes (1)
    • formaldehyde (15)
    • fragrances (1)
    • front group (13)
    • fT4 (1)
    • Funding (1)
    • GAO (1)
    • general interest (22)
    • Generally Recognizes as Safe (1)
    • George Washington University (1)
    • Georgia (1)
    • Georgia Health News (1)
    • Globally Harmonized System (GHS) (5)
    • Government Accountability Office (5)
    • GRAS (5)
    • haz (1)
    • hazard (6)
    • health-based benchmark (3)
    • High Production Volume (HPV) (23)
    • home buyers (1)
    • home sales (1)
    • Household action level (3)
    • HUD (3)
    • hypochlorite (2)
    • hypochlorite bleach (2)
    • Hypothyroxinemia (1)
    • ICC (1)
    • IEUBK (1)
    • in vitro (14)
    • in vivo (11)
    • Indiana (1)
    • industry tactics (45)
    • inf (1)
    • Infants (1)
    • informed substitution (1)
    • Infrastructure (1)
    • inhalation (18)
    • International Code Council (1)
    • IUR/CDR (27)
    • Japan (3)
    • Lautenberg Act (72)
    • LCR (2)
    • lead (34)
    • Lead 1950 (1)
    • lead and copper rule (4)
    • lead dust hazard (2)
    • Lead Dust Standards (1)
    • Lead Exposure (6)
    • lead hazard (2)
    • Lead in Drinking Water (6)
    • lead poisoning preventon (1)
    • Lead Service Line (4)
    • Lead Service Lines (4)
    • lead-based paint (6)
    • Lead-safe (1)
    • lead-safe renovations firms (1)
    • lead-safe renovator (1)
    • Legislation (1)
    • Los Angeles (1)
    • LSHR (1)
    • LSL (1)
    • LSL Replacement Collaborative (1)
    • Mapping (1)
    • markets (1)
    • Markey (1)
    • MCHM (1)
    • mercury (4)
    • methyl eugenol (1)
    • methylene chloride (3)
    • methylmercury (2)
    • microbiome (3)
    • Milken Institute School of Public Health (1)
    • model (2)
    • NAAQS (1)
    • nanodelay (4)
    • nanosilver (6)
    • National Academy of Sciences (NAS) (20)
    • National Institute for Occupational Safety and Health (NIOSH) (7)
    • National Institute of Environmental Health Sciences (NIEHS) (5)
    • National Nanotechnology Initiative (NNI) (7)
    • National Toxicology Program (1)
    • NCHH (1)
    • NDWA (1)
    • NDWAC (2)
    • neurodevelopment (1)
    • Neurotoxin (1)
    • New chemicals (11)
    • Newark (1)
    • NHANES (2)
    • Nitrates (1)
    • NL Industries (1)
    • NMP (3)
    • NYC (1)
    • Oatmeal (1)
    • Obama (1)
    • obesity (6)
    • Occupational Safety and Health Administration (OSHA) (3)
    • Office of Information and Regulatory Affairs (OIRA) (4)
    • Office of Management and Budget (OMB) (16)
    • Office of Pollution Prevention and Toxics (OPPT) (3)
    • Ohio (1)
    • oil dispersant (18)
    • ortho-phthalate (1)
    • ortho-phthalates (2)
    • packaging (1)
    • paint (2)
    • PBDEs (19)
    • peer review (1)
    • Pennsylvania (1)
    • perchlorate (8)
    • Persistent Bioaccumulative and Toxic (PBT) (22)
    • personal care products (1)
    • pesticide (1)
    • pesticides (8)
    • PFOA (1)
    • Philadelphia (1)
    • phthalate (1)
    • phthalates (21)
    • pipes (1)
    • plastic packaging (1)
    • Podcast (9)
    • polycyclic aromatic hydrocarbons (PAH) (5)
    • Pregnant Women (1)
    • prenatal (6)
    • prioritization (38)
    • Private Property (1)
    • Pruitt (1)
    • Public Nuisance (1)
    • Public Water Supplier (1)
    • PWS Water Board (1)
    • Quigley (1)
    • real estate (1)
    • red (1)
    • Redfin (1)
    • Reference Dose (1)
    • Regulatory Accountability Act (3)
    • Regulatory Reform (1)
    • renovation (1)
    • rental (1)
    • renters (1)
    • report on carcinogens (1)
    • reproductive (2)
    • residential code (1)
    • revised CSIA (4)
    • Rice (1)
    • rice cereal (1)
    • right-to-know (1)
    • risk assessment (73)
    • Risk Communication (1)
    • risk evaluation (2)
    • RRP (1)
    • Safe Chemicals Act (24)
    • Safer Chemicals Healthy Families (33)
    • safety (2)
    • salami (2)
    • SB 1398 (1)
    • Science Advisory Board (1)
    • SDWA (1)
    • Seattle (1)
    • secrecy (1)
    • SHEDS (1)
    • Sherwin Williams (1)
    • Sierra Club (1)
    • Significant New Use Rule (SNUR) (21)
    • Small business (1)
    • snur (1)
    • soil (1)
    • soil lead hazard (1)
    • South Korea (4)
    • State Senator Levya (1)
    • styrene (7)
    • Substances of Very High Concern (SVHC) (15)
    • synthetic dyes (1)
    • systematic review (1)
    • T4 (1)
    • TBB (2)
    • TDS (1)
    • test rule (18)
    • Thiocyanate (1)
    • Toddlers (1)
    • toolkit (1)
    • total diet study (2)
    • Tox21 (5)
    • ToxCast (10)
    • toxic substances control act (1)
    • Transparency (2)
    • tributyltin (3)
    • trichloroethylene (TCE) (10)
    • TSCA inventory (2)
    • TSCA Modernization Act (14)
    • TSCA Reform (1)
    • TSCA Title IV (1)
    • Turkey (3)
    • U.S. states (18)
    • User Service Line (1)
    • Utility Commission (1)
    • Voluntary (1)
    • vulnerable populations (1)
    • Walmart (3)
    • Washington Post (1)
    • WebMD (1)
    • Wisconsin (1)
    • worker safety (23)
    • wristband (2)
    • WV chemical spill (12)
    • yellow (1)
    • Zillow (1)