1,088 chemicals, profiled from the public record.

266 chemicals

Classified as a known, probable or possible human carcinogen by at least one authority — IARC, the National Toxicology Program, OSHA or EPA.

210 chemicals

Insecticides, herbicides, fungicides and fumigants, including the organophosphates, carbamates and pyrethroids tracked in agricultural use data.

209 chemicals

On EPA's list of hazardous air pollutants, the 188 chemicals that industrial facilities must report and that AirToxScreen models at census-tract level.

150 chemicals

Known or suspected of interfering with hormone systems — including thyroid function, development and fertility.

96 chemicals

Volatile organic compounds and industrial solvents. These evaporate at room temperature, which is why they dominate indoor air.

68 chemicals

Linked to effects on fertility, pregnancy or development, including teratogens and chemicals flagged for male or female reproductive toxicity.

45 chemicals

Regulated or monitored under the Safe Drinking Water Act, including disinfection byproducts formed by treatment itself.

38 chemicals

Metals and metalloids that persist in soil and dust and accumulate in the body over years rather than clearing quickly.

32 chemicals

Linked to effects on the brain and nervous system, including cholinesterase inhibitors used in pest control.

13 chemicals

Per- and polyfluoroalkyl substances — the "forever chemicals" that resist breakdown and turn up in water systems and blood serum.

32 chemicals

Persistent, bioaccumulative and toxic (PBT) chemicals and persistent organic pollutants — they stay in the environment and build up the food chain.

22 chemicals

Irritants, sensitizers and gases that act on the airways, from asthma triggers to chemicals that displace oxygen.

19 chemicals

On the CERCLA priority list — the substances most often found at, and most hazardous around, National Priorities List sites.

27 chemicals

Shown to damage DNA directly, including the alkylating agents that underlie several occupational cancer findings.

5 chemicals

Radioactive substances tracked in air, water and fallout records.

1,088 chemicals

Every profile in the library, A to Z. About half carry no hazard classification yet, which usually reflects what agencies have reviewed rather than a clean bill of health.