Biddeford Water Hardness & Quality Report (2026)

The Biddeford-Saco Division of Maine Water serves Biddeford and Saco in York County, Maine, providing drinking water to over 20,000 residents. Primary sources are surface water intakes from the Saco River and local reservoirs, treated at the Biddeford-Saco Water Treatment Plant. The utility is part of Maine Water Company and distributes water through aging infrastructure noted for lead service lines in older neighborhoods. A 2015 source water assessment rated contamination risk as low.

The Saco River basin drains 1,293 square miles from the White Mountains through forested and rural lands into tidal estuaries. Bedrock geology consists of igneous and metamorphic rocks including the Sebago Pluton (Devonian granite) and Merrimack Belt schists, with no significant carbonate aquifers. Glacial till and thin soils overlay this siliceous terrain. The near-absence of limestone or dolomite means minimal calcium and magnesium dissolution, yielding a very soft water supply naturally low in dissolved minerals.

Soft water poses no scaling risk — no calcium buildup occurs in water heaters, pipes, or dishwashers. However, low mineral content can make the supply mildly corrosive to metal plumbing, potentially leaching lead or copper from older pipes. The 2023 Consumer Confidence Report noted lead levels exceeding action levels at 10% of taps (up to 15 ppb); flushing taps before use is strongly advised. Disinfection byproducts were elevated — haloacetic acids 16–37 ppb, trihalomethanes 21–61 ppb — from chlorination of river organics. No softener is needed; maintenance should focus on regular flushing, aerator cleaning, and corrosion control.