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 9
R A D I O LO G I C A L S U B S TA N C E S
We are only required to test for radiological substances once every 9 years, and in 2017 Gross Beta particles were detected.
SUBSTANCE
(UNIT OF
MEASURE)
YEAR
SAMPLED
HIGHEST
LEVEL
ALLOWED
(MCL)
HIGHEST
LEVEL
GOAL
(MCLG)
AMOUNT
DETECTED
RANGE VIOLATION
TYPICAL
SOURCE
Gross Beta
(pCi/L)
2017 50 0 4.2 No range No
Decay of natural and
man-made deposits
SUBSTANCE
(UNIT OF
MEASURE)
YEAR
SAMPLED
HIGHEST
LEVEL
ALLOWED
(MCL)
HIGHEST
LEVEL
GOAL
(MCLG)
AMOUNT
DETECTED
RANGE VIOLATION
TYPICAL
SOURCE
Total Organic
Carbon
(removal ratio)
2022
TT = Removal
ratio of >1
N/A
1.59
(running annual
average)
1.36 –1.86
(range of
monthly)
No
Naturally present in
the environment
T O TA L O R GA N I C C A R B O N ( D I S I N F E C T I O N BY P R O D U C T P R E C U R S O R )
Natural organic matter that can combine with disinfectants to form disinfection byproducts.
