Drinking Water Chemical Analysis
After the water is pumped from the ground, we add a blended phosphate to control interior corrosion of the pipes and it also helps to sequester iron and manganese which is in the groundwater. We add chlorine to the water as a disinfectant to prevent the spread of water born disease. Disinfection destroys pathogenic (disease causing) organisms in water. Fluoride is found naturally in water and we add it to reduce tooth decay. The following are average residuals for the chemicals we add to the water:
- Chlorine .2 to .07 ppm (part per million)
- Blended phosphate 1 ppm
- Fluoride 1.1 ppm
We do routine monitoring for microbiological contaminants by collecting nine samples every week in various parts of the distribution system. In addition, we monitor the system for chlorine by taking eleven samples per week. Blended phosphate is monitored twice per week and fluoride is monitored once per day.
After the water is pumped from the ground, if it is not used up prior to the elevated tank, it is stored until it is needed. We have three storage facilities; one an elevated tank is located in the 1700 block of Water Street, a ground level reservoir located in the 100 block of Georgia Street North and lastly, an elevated tank located in the 300 block of Bliss Avenue. The elevated tanks hold 1,750,000 gallons of water and the ground level reservoir is capable of holding 2,250,000 gallons of water. Our average day pumpage for 2008 was 6.2 million gallons per day.
See the Latest Drinking Water Chemical Analysis Results (PDF)