The most recent compliance testing was conducted in 2019 and 90% of the homes tested had lead concentrations at or below 12 µg/L. The current EPA limit for lead is 15 µg/L and the City of Duluth is in compliance with that limit.
Additional testing was conducted in May 2021 in preparation for changes to EPA regulations, which will take effect in 2024. Among the changes is a new sample collection procedure, which is more likely to capture water that has been sitting in the service line for an extended period of time. This testing showed higher levels of lead than previous monitoring with 90% of samples testing at or below 32 µg/L. The results at the 102 sites tested ranged from no detectable lead to 62 µg/L. Sites with high lead levels were scattered throughout Duluth.