Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Potassium-40

Status: No national drinking water standard exists

 

Potassium-40 is a radioactive form of potassium. Radioactive substances increase the risk of cancer. Click here to read more on radiological contaminants.

2014-2019:

FOUND

1

states detected

1

utilities detected

524

people served

Health concerns for potassium-40

Cancer

States reporting potassium-40 in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
Connecticut1524
MORE
LESS

Filtering technologies that reduce potassium-40

reverse osmosis icon

Reverse Osmosis

Utilities with the highest amounts of potassium-40, 2014-2019

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Southeastern Connecticut Water Authority, Chesterfield DivisionGales Ferry, CT1 of 155.70 ppb524
UtilityLocationTestsAverage levelPeople served