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Short entry

Vinyl chloride in drinking water

We haven’t published a full explainer for Vinyl chloride yet, so this page only shows what we can stand behind and where to go next.

This page can’t tell you what’s in your tap water.
Only a test of water from your own tap can. Public-system results describe the system, not your home.
2 sources
01Private well guidanceWell Water · asks about your well02Check your public systemWater Check · system results only03Search WaterDecoderRelated pages and tools
Reference values

A legal limit — and a lower health goal.

Enforceable limit · MCLFederal · public water systems
2 ppb

The highest level allowed in water a public system delivers. A legal limit, not a health goal.

Applies to
Water delivered by public water systems, not private wells
Status
In force
Source
EPA NPDWR MCL (0.002 mg/L) · 40 CFR §141.61(a)
Health-based goal · MCLGFederal · not enforceable
0 ppb

The level below which no known health risk is expected. A goal, not a limit.

Applies to
Set alongside the rule as a public-health goal
Status
Published goal
Source
EPA National Primary Drinking Water Regulations — MCLG zero · 40 CFR §141.50
How they relate
Health-based goalNo known risk expected below itEnforceable limitThe legal maximum

Water between the two isn’t automatically safe. A goal and a legal limit answer different questions. Positions are illustrative, not to scale.

Your stateNot held yetStates may set their own references. We don’t hold a state reference for vinyl chloride yet.
Is it in my water?

Only a test can tell.

Start with the tool that matches your water source.

Private well → Well WaterAsks about your wellPublic water → Water CheckSystem results, not your tap · asks for your ZIP
Treatment

No treatment evidence yet.

We don’t hold treatment evidence for Vinyl chloride yet, so we don’t describe methods or show products on this page.

References

Where these facts come from

  • 40 CFR §141.61(a) · EPA NPDWR MCL (0.002 mg/L)
  • 40 CFR §141.50 · EPA National Primary Drinking Water Regulations — MCLG zero
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