Flagstaff Water

The Flagstaff Municipal Water System had a treatment technique violation for chlorination. The chlorination system at the North Reservoirs Filtration Plant went into emergency shut down on 7-13-2006 at 10:45 PM and was returned to normal operation 7-14-2006 at 8:00 AM. As a result finished water entering the 250,000 gallon clear well at the plant had a concentration < 0.2 ppm for over 4 hours. The non-chlorinated water mixed with water that was already in the clear well that had a concentration of approximately 1 ppm. Different sources of water primarily serve different parts of the city.

The area that had the greatest potential to be affected by this incident was the Cheshire sub-division.

You do not need to boil your water or take other corrective actions. However, if you have specific health concerns, consult your doctor.

Full Public Notice (33KB Adobe PDF)