2005 TTHM - 4th 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.

Beginning with the fourth quarter 2005 results, we're only being supplied with the Total Trihalomethane results, rather than the results of each of the four components that make up the Trihalomethane group.
Total Trihalomethanes - East Plant - test collected at 755 E.Boone St.
Test Test DateResult in Miligrams per liter (mg/l)
Detection Limit
Bromodichloromethane
10/31/2005
.???? mg/l
.0005 mg/l
Bromoform
10/31/2005
???? mg/l
.0005 mg/l
Chlorodibromomethane
10/31/2005
.???? mg/l
.0005 mg/l
Chloroform
10/31/2005
.???? mg/l
.0005 mg/l
Total Trihalomethanes
10/31/2005
.0137 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
10/31/2005
.???? mg/l
.0005 mg/l
Bromoform
10/31/2005
???? mg/l
.0005 mg/l
Chlorodibromomethane
10/31/2005
.???? mg/l
.0005 mg/l
Chloroform
10/31/2005
.???? mg/l
.0005 mg/l
Total Trihalomethanes
10/31/2005
.0577 mg/l
MAX Allowable .0800 mg/l