C A RY, N O RT H C A R O L I N A A N N U A L WAT E R Q U A L I T Y R E P O R T 2 0 2 2 15
SUBSTANCE
(UNIT OF
MEASURE)
YEAR
SAMPLED
HEALTH
ADVISORY
AVG.
AMOUNT
DETECTED
RANGE VIOLATION
TYPICAL
SOURCE
1,4-Dioxane (ppb) 2022 35 ND ND–0.14 No
Byproduct in paint strippers,
dyes, greases, antifreeze,
aircraft deicing fluids, deodorants,
shampoos, cosmetics, manufacture
of pharmaceuticals and
manufacture of PET plastic
1, 4 - D I OX A N E
What is 1,4-dioxane? 1,4-dioxane
is a colorless, flammable liquid often
used as a solvent or solvent stabilizer
in the manufacture and processing of
polyethylene terephthalate (PET), cotton,
textile products, automotive coolant,
cosmetics, shampoos, and other products.
Is 1,4-dioxane regulated?
1,4-dioxane is not currently regulated.
However, EPA has established a health
advisory of 35 parts per billion (ppb).
Health advisories are not regulatory limits,
they provide technical guidance to state
agencies and public health officials.
Is 1,4-dioxane found in the
Cary's drinking water?
The test results demonstrate that
1,4-dioxane levels in our drinking
water have been well below the
EPA's health advisory.
