Is there lead in Waterloo's tap water?
9.6PPBLead in Waterloo's water at the latest test, from July to December 2025
Below 15, the level that requires action
Below 15, the level that requires action
6 public water companies list Waterloo as a place they supply. The biggest is Waterloo's water department, with about 7,000 people. The highest latest result among Waterloo's water companies is 91.4 parts per billion, at the South Pre-Emption Water District. 1 of them was above 15 at their latest test. 1 has no lead test results on file. 4 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.