Haloacetic Acids (HAA9) in your water

Is Haloacetic Acids (HAA9) in drinking water dangerous?

It depends on the level and how long you're exposed. The EPA has set no federal legal limit for Haloacetic Acids (HAA9). Meeting the legal limit isn't the same as zero risk — test your water to know your level.

How do you remove Haloacetic Acids (HAA9) from water?

Haloacetic Acids (HAA9) is treated by Reverse Osmosis and Whole-House Carbon Filter. Choose a system independently certified to NSF/ANSI standards to reduce Haloacetic Acids (HAA9), and test your water first to confirm the level.

Health effects

HAA9 is a broader measure of nine haloacetic-acid disinfection byproducts, of which only five are federally regulated. They form the same way as HAA5 - chlorine reacting with organic matter - and carry similar long-term cancer-risk concerns. The wider HAA9 group captures byproducts the federal standard does not.

The health-based goal vs. the legal limit

The federal legal limit (MCL) is the maximum allowed by law. The EPA health goal (MCLG) is the level below which no health risk is expected — it is non-enforceable and often stricter than the legal limit.

What removes Haloacetic Acids (HAA9)

1. 1

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