Contaminant
Trihalomethanes (TTHMs)
≈80–206× the EWG health guideline
A disinfection byproduct linked in long-term studies to bladder cancer and pregnancy complications. Below the federal legal limit everywhere in the metro — about 80× the EWG health guideline in the City, and roughly 206× for Missouri American customers in St. Louis and St. Charles County.
Learn more →
