Page 7 - CCR2022

Monitoring Results – Regulated Substances

LEAD AND COPPER – Tested at customer taps.

Number
EPA’s of
Contaminant (Date, if EPA’s 90% of
sampled in previous Ideal Action Results Were Homes Violation Typical Sources
year) Goal Level Less Than with
(MCLG) High
Levels

Lead 0 ppb 90% of 3.82 ppb 0 out of NO Corrosion of
homes 30 household
less than plumbing.
15 ppb

Copper 0 ppm 90% of 0.31 ppm 0 out of NO Corrosion of
homes 30 household
less than plumbing.
1.3 ppm

INORGANIC & ORGANIC CONTAMINANTS – Tested in drinking water.

Highest
EPA’s
Contaminant (Date, EPA’s Average or Range of
if sampled in Ideal Limit Highest Detected Violation Typical Sources
previous year) Goal (MCL) Single Test Test Results
(MCLG)
Result

Nitrate 10 ppm 10.4 0.57 ppm 0.00 - 0.57 NO Runoff from fertilizer
ppm ppm use; Leaching from
septic tanks, sewage;
Erosion of natural
deposits.

Barium (08/31/20) 2 ppm 2 ppm 0.22 ppm N/A NO Discharge of drilling
wastes; Discharge
from metal refineries;
Erosion of natural
deposit.

1,1,1- 200 ppb 200 1.7 ppb N/A NO Discharge from metal
Trichloroethane ppb degreasing sites and
(2021) other factories.

Combined Radium 0 pCi/l 5.4 4 pCi/l 1.2 - 4.0 NO Erosion of natural
pCi/l pCi/l deposits.