Page 6 - CCR 2020

CONTAMINANTS RELATED TO DISINFECTION – Tested in drinking water.
EPA’s EPA’s Highest Range of
Substance (Date, if Ideal Limit Average Detected Typical
sampled in Goal (MCL or or Highest Test Violation Sources
previous year) (MCLG or Single Test
MRDLG) MRDL) Result Results
Total N/A 80 ppb 54.8 ppb 42.70 - NO By-product of
Trihalomethanes 54.80 ppb drinking
(TTHMs) water
disinfection.
Total Haloacetic N/A 60 ppb 8.1 ppb 5.40 - 8.10 NO By-product of
Acids (HAA) ppb drinking
water
disinfection.
Total Chlorine 4.0 ppm 4.0 0.35 ppm 0.24 - 0.49 NO Water
ppm ppm additive used
to control
microbes.

Total HAA refers to HAA5
OTHER SUBSTANCES – Tested in drinking water.

Highest
Substance EPA’s Range of
(Date, if Ideal EPA’s Average or Detected
Highest
Limit
sampled in Goal (MCL) Single Test Test Violation Typical Sources
previous year) (MCLG) Results
Result
Fluoride 4.0 ppm 4.0 0.7 ppm 0.59 - 0.81 NO Erosion of
ppm ppm natural
deposits; Water
additive to
promote strong
teeth.

Potential Health Effects and Corrective Actions (If Applicable)
Fluoride: Fluoride is nature's cavity fighter, with small amounts present naturally in many drinking
water sources. There is an overwhelming weight of credible, peer-reviewed, scientific evidence that
fluoridation reduces tooth decay and cavities in children and adults, even when there is availability
of fluoride from other sources, such as fluoride toothpaste and mouth rinses. Since studies show
that optimal fluoride levels in drinking water benefit public health, municipal community water
systems adjust the level of fluoride in the water to an optimal concentration between 0.5 to 0.9
parts per million (ppm) to protect your teeth. Fluoride levels below 2.0 ppm are not expected to
increase the risk of a cosmetic condition known as enamel fluorosis.