What is Acetone* and Why Does It Matter?

Acetone in Tap Water: What You Need to Know

Most people know acetone as nail polish remover. But this common chemical also shows up in drinking water — and it's worth understanding why.

Acetone is a colorless, flammable solvent used in manufacturing plastics, pharmaceuticals, and cleaning products. It enters water supplies through industrial discharge, chemical plant runoff, and improper waste disposal. Acetone also occurs naturally in small amounts — the human body even produces it during normal metabolism. Still, when it shows up in tap water at measurable levels, the source is almost always industrial activity nearby.

Across the United States, acetone has been detected in 132 water systems. The average detected level sits at 9.724 parts per billion (ppb), but the highest recorded level reaches 550.9 ppb — a significant jump from the norm. At low levels, acetone is considered relatively low-risk compared to other water contaminants. Short-term exposure to higher concentrations, however, can cause headaches, dizziness, and irritation of the eyes, nose, and throat, according to the EPA. Long-term studies on acetone in drinking water are limited, which is part of why health advocates push for more monitoring rather than less.

Here's where things get a bit frustrating for consumers: the EPA has not set a Maximum Contaminant Level (MCL) — that's the legal limit — specifically for acetone in drinking water. Without a federal legal limit, water utilities aren't required to reduce it even when levels are elevated. The EPA does list acetone on its contaminant candidate list for future review, but no enforceable standard exists today. This regulatory gap means your water could contain acetone above any reasonable health threshold, and your utility would still be in full compliance with the law.

Geographically, the data tells a clear story. Texas accounts for 123 of the 132 systems where acetone was detected — that's 93% of all reported cases. West Virginia follows with 7 systems, and New York rounds out the top three with 2. Texas's high numbers aren't surprising given the state's concentration of petrochemical plants, refineries, and industrial facilities, particularly along the Gulf Coast. West Virginia's appearance reflects its long history of chemical manufacturing and coal-related industry. New York's detections are smaller in number but worth noting, especially for residents near industrial corridors in the Hudson Valley or western part of the state.

The good news is that acetone can be effectively removed from drinking water. Activated carbon filtration — the kind found in many under-sink and countertop filters — does a solid job of reducing acetone levels. For households where the highest levels of concern apply, a reverse osmosis (RO) system offers even more complete protection, removing a broad range of chemical contaminants in a single pass. Echo Water's reverse osmosis systems are designed specifically for this kind of whole-contaminant coverage, giving families one reliable solution rather than piecing together multiple filters. If you're in Texas, West Virginia, or near any industrial area, it's worth testing your water first to know exactly what you're dealing with. From there, choosing the right filter becomes a straightforward decision rather than a guessing game.

Regulatory Standards for Acetone*

Cities With the Highest Acetone* Levels

States Most Affected by Acetone*

Frequently Asked Questions

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