Contaminant glossary

Delays in physical and mental development in infants and children.

Short-term gastrointestinal distress.

Known human carcinogen linked to stomach, lung, and nasal cancers with long-term ingestion.

Allergic dermatitis in sensitive individuals.

Skin damage and circulatory problems.

Increases blood pressure at elevated levels.

Kidney damage with long-term exposure.

Kidney damage and nervous-system effects above the MCL.

Causes methemoglobinemia ("blue-baby syndrome") in infants under 6 months.

Causes methemoglobinemia in infants.

Dental and skeletal fluorosis with long-term exposure above the MCL.

Cancer, thyroid disease, immune and developmental effects.

Liver and thyroid harm, immune suppression, increased cancer risk.

Developmental toxicity, liver damage, and immune disruption.

Thyroid and immune effects.

Liver toxicity and developmental effects.

Thyroid effects.

Long-term exposure increases bladder-cancer risk.

Increased cancer risk with long-term exposure.

Anemia and decreased blood platelets.

Liver damage and increased cancer risk.

Liver problems and increased cancer risk.

Cardiovascular or reproductive effects.

Increased cancer risk and kidney toxicity with long-term exposure.

Increased cancer risk with long-term exposure to radioactivity.

Indicates possible sewage or animal-waste contamination and potential pathogens.

Indicates fecal contamination.