Physical & aggregate
Specific Conductance in U.S. tap water
267 public water systems across 14 U.S. states report Specific Conductance in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
What it is
A measure of how well water conducts electricity, which tracks dissolved mineral content.
Why it's regulated
Not federally regulated for health; used as a proxy for total dissolved solids.
Within the federal limit (1)
| Water system | Measured |
|---|---|
| Golden Hills Csd — Tehachapi, Ca, CA 2022 annual report | 0 uS/cm |
Frequently asked
+What is Specific Conductance?
A measure of how well water conducts electricity, which tracks dissolved mineral content. Not federally regulated for health; used as a proxy for total dissolved solids.
+Does Specific Conductance have a federal limit in drinking water?
Specific Conductance does not have an enforceable federal MCL. Utilities still report any measured levels in their annual Consumer Confidence Report.
+How many U.S. water systems have Specific Conductance over the federal limit?
Zero of the 267 public water systems in The Water Map dataset currently report Specific Conductance at or above its federal limit.
+How can I check if Specific Conductance is in my city's tap water?
Search your city on The Water Map (https://www.thewatermap.com/) or browse the list on this page. Every U.S. public water utility is required to publish an annual Consumer Confidence Report that lists every contaminant it measured, including Specific Conductance.