Fluoridation

Drinking water in Otay Water District’s service area is fluoridated. Otay Water District does not add fluoride to the water supply. Rather, the District purchases treated drinking water from area water wholesalers. Water wholesalers supplement the existing fluoride in the water supply raising it to approximately 0.8 parts per million (ppm), the level recommended by public health experts for optimal dental health.

Some fluoride is already present in our water supply. Most water in San Diego County comes from the Colorado River or the Sierra snow pack. As water passes over the surface of the earth, it picks up fluoride through the natural erosion process. Fluoride is present in the water supply at approximately 0.2 ppm, with a range of 0.1 to 0.4 ppm. After January, 2011, all water in the region’s distribution network has been consistently between 0.6 to 0.9 ppm.

We encourage customers taking or who are considering taking fluoride supplements to consult their medical or dental health care professional.

More information about fluoridation is available by visiting the websites listed below the fluoride table.


Otay Water District Fluoride Levels (in parts per million)
2019	Jan	Feb	Mar	Apr	May	June	July	Aug	Sept	Oct	Nov	Dec
Spring Valley, La Presa, Rancho Del Rey, Bonita Long Canyon, Terra Nova	0.7	0.7	0.7	0.7	0.7	0.7	0.5	0.6
Ranch San Diego, Jamul	0.7	0.7	0.7	0.7	0.7	0.7	0.5	0.6
East Chula Vista	0.7	0.7	0.6	0.7	0.7	0.6	0.5	0.6
Otay Mesa	0.7	0.7	0.7	0.7	0.7	0.7	0.5	0.5


Otay Water District Fluoride Levels (in parts per million)
2019	Spring Valley, La Presa, Rancho Del Rey, Bonita Long Canyon, Terra Nova	Rancho San Diego, Jamul	East Chula Vista	Otay Mesa
Jan	0.7	0.7	0.7	0.7
Feb	0.7	0.7	0.7	0.7
Mar	0.7	0.7	0.6	0.7
Apr	0.7	0.7	0.7	0.7
May	0.7	0.7	0.7	0.7
June	0.7	0.7	0.6	0.7
July	0.5	0.5	0.5	0.5
Aug	0.6	0.6	0.6	0.5
Sept
Oct
Nov
Dec

Helpful Links

fluoride-table