Delta Water Quality

5 EPA violations on record (most recent 2023). Arsenic is a naturally occurring element that dissolves into groundwater from rock and is also released by mining and industry. Long-term exposure is associated with several cancers and with skin, cardiovascular, and developmental harm. It is common in parts of the Southwest.

3 EPA violations on record (most recent 2020). Atrazine is one of the most widely used weed killers and reaches water through agricultural runoff. It is an endocrine disruptor associated with reproductive and developmental effects, and concentrations tend to spike seasonally after application. It is most common in farming regions.

3 EPA violations on record (most recent 2020). PFOA is a long-lived "forever chemical" once used to make nonstick and stain-resistant products. It builds up in the body over time and is associated with certain cancers, immune effects, and developmental harm. EPA finalized a strict drinking-water limit for it in 2024.

Delta's water is very hard. Hardness isn't a health risk, but it drives scale on fixtures and water heaters, shortens appliance life, and leaves skin and hair dry.