TTHMs (Total trihalomethanes)

GENERAL INFORMATION
Trihalomethane occur when naturally-occurring organic and inorganic materials in the water react with the disinfectants, chlorine and chloramine.

HEALTH EFFECTS
Some people who drink water containing total trihalomethanes in excess of the MCL over many years could experience liver, kidney, or central nervous system problems and increased risk of cancer.

Standard value 1: 
80.00
Standard units 1: 
ppb
Input units: 
ug/L
ppb
Contaminant group: 
VOC
Standard type 1: 
MCL
Action is recommended 1: 

MCL ADVISORY - ACTION IS HIGHLY RECOMMENDED
Trihalomethane levels were detected in your water sample to exceed the maximum contaminant level (MCL).

Action is optional 1: 

ACTION IS OPTIONAL
Trihalomethane levels were detected in your water sample but do not exceed the maximum contaminant level.

Typical range in Ohio: 
detection suggest human source
Treatment options: 

TREATMENT OPTIONS
Granular Activated Carbon (GAC) or Powdered Activated Carbon (PAC) are considered the best available technologies (BAT) for treatment of many organic contaminants including organic pesticides, volatile organic compound (VOCs), and Trihalomethanes (THMs) (by-products of chlorination). Treatment can be at the tap (called point of use or POU) or the entire house.

Website resources: 

WEBSITE RESOURCES

Fact sheets: 

FACT SHEETS