Metals · 2024
Arsenic in Seattle, WA tap water
Seattle, WA's 2024 report shows Arsenic detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average System-wide | 0.23 ug/L | 0 ug/L MCLG |
Range System-wide | 0.2 ug/L | 0 ug/L MCLG |
Average System-wide | 0.23 ug/L | 0 ug/L MCLG |
Range System-wide | 0.2 ug/L | 0 ug/L MCLG |
Verbatim from Seattle, WA's 2024 Consumer Confidence Report — source document ↗
About Arsenic
A naturally occurring element that also enters water from industry and agriculture.
A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
How Seattle, WA compares
4 of the 169 systems measuring Arsenic on The Water Map have it at or above the federal limit:
Nearby systems also reporting Arsenic:
People also ask
+Is there Arsenic in Seattle, WA tap water?
Yes — Seattle, WA's 2024 Consumer Confidence Report lists Arsenic at 0.23 ug/L. Seattle, WA's 2024 report shows Arsenic detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Arsenic in drinking water?
The federal MCLG for Arsenic is 0 ug/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Arsenic?
A naturally occurring element that also enters water from industry and agriculture. A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
+Which other U.S. cities have Arsenic over the federal limit?
4 of the 169 systems on The Water Map measuring Arsenic report it at or above the federal limit. Examples include Albuquerque, NM, Beaches Water, MD, Beaver Run Mhp, MD.
+Where does this Arsenic measurement come from?
This page reproduces the Arsenic entry from the 2024 Consumer Confidence Report published by the Seattle, WA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/wa/seattle/2024/source.