2005 TTHM - 2nd quarter
(Total Trihalomethanes)

Our TTHM testing is done quarterly, and there are two sets of tests, one for each treatment plant. Our treatment plants are listed as "entry points". The newer plant, on McKinley Avenue, is EP#1, and the older plant on East Washington Street is EP#2. TTHM testing is done at points of maximum residence time in the system. Each of the two points have been selected to represent one of the two treatment plants.

The maximum allowable limit on Total Trihalomethanes is .0800 mg/l. Total Trihalomethanes are associated with the disinfection process, and are attritubutable to the addition of Chlorine to the water system. Reactions between the Chlorine and elements within the water, produce Trihalomethane compounds.

The analysis of these tests was done by Environmental Labs, Inc. of Madison, Indiana.

Total Trihalomethanes - East Plant - test collected at 755 E.Boone St.
Test Test DateResult in Miligrams per liter (mg/l)
Detection Limit
Bromodichloromethane
5/9/2005
.0041 mg/l
.0005 mg/l
Bromoform
5/9/2005
<.0005 mg/l
.0005 mg/l
Chlorodibromomethane
5/9/2005
.0007 mg/l
.0005 mg/l
Chloroform
5/9/2005
.0114 mg/l
.0005 mg/l
Total Trihalomethanes
5/9/2005
.0162 mg/l
MAX Allowable .0800 mg/l

Total Trihalomethanes - West Plant - test collected at Wastewater Treatment Plant lab sink
Test Test DateResult in Micrograms per liter (ug/l)
Detection Limit
Bromodichloromethane
5/9/2005
.0144 mg/l
.0005 mg/l
Bromoform
5/9/2005
<.0005 mg/l
.0005 mg/l
Chlorodibromomethane
5/9/2005
.0032 mg/l
.0005 mg/l
Chloroform
5/9/2005
.0379 mg/l
.0005 mg/l
Total Trihalomethanes
5/9/2005
.0555 mg/l
MAX Allowable .0800 mg/l