Barium (ppm) |
2 ppm |
2 ppm |
0.20 ppm |
0.32 ppm |
0.066 - 0.32 ppm |
YES |
Erosion of natural deposits |
Fluoride (ppm) |
4 ppm |
4 ppm |
0.63 ppm |
0.80 ppm |
0.48 - 0.80 ppm |
YES |
Natural deposits & treatment additive |
Nitrate (ppm) |
10 ppm |
10 ppm |
ND |
ND |
ND |
YES |
Fertilizer, septic tank leachate |
Xylenes, Total (ppb) |
10,000 ppb |
10,000 ppb |
0.80 ppb |
0.997 ppb |
ND - 0.997 ppb |
YES |
Discharge from petroleum factories; discharge from chemical factories |
E coli |
0 |
1 |
ND |
ND |
ND |
YES |
Human and animal fecal waste |
Total Coliforms |
N/A |
5.0% |
0.17% |
2.1% |
0 - 2.1% |
YES |
Naturally present in the environment |
Combined Radium (-226 & -228) [2020 data] |
0 |
5 pCi/L |
N/A |
1.2 pCi/L |
ND - 1.2 pCi/L |
YES |
Erosion of natural deposits |
Combined Uranium [2016 data] |
0 |
30 ppb |
N/A |
1.1 ppb |
0.54 - 1.1 ppb |
YES |
Erosion of natural deposits |
Gross Alpha, Excl. Radon & Uranium [2019 data] |
0 |
15 pCi/L |
N/A |
3.2 pCi/L |
ND - 3.2 pCi/L |
YES |
Erosion of natural deposits |
Contaminant |
MCLG |
AL |
Average of All Samples |
Maximum of All Samples |
2021 System Wide Range |
Compliance Achieved |
Possible Source |
Copper (ppm) [2021 Data] |
1.3 ppm |
1.3 ppm
(90th percentile) |
0.19 ppm |
0.51 ppm |
0.36 ppm is the
90th Percentile
(0 of 37 > AL) |
YES |
Corrosion of customer plumbing |
Lead (ppb) [2021 Data] |
0 ppb |
15 ppb
(90th percentile) |
0.95 ppb |
7.6 ppb |
3.4 ppb is the
90th Percentile
(0 of 37 > AL) |
YES |
Corrosion of customer plumbing |
Contaminant |
MCL |
Average of All Samples |
Maximum of All Samples |
System Wide Range |
Compliance Achieved |
Possible Source |
Total Trihalomethanes (TTHMs) |
80 ppb
(LRAA) |
11 ppb |
12 ppb (LRAA) |
3.2 - 26 ppb |
YES |
By-product of chlorination treatment |
Haloacetic acids (HAA5) |
60 ppb
(LRAA) |
6.3 ppb |
7.4 ppb (LRAA) |
2.7 - 16 ppb |
YES |
By-product of chlorination treatment |
SECONDARY DRINKING WATER STANDARDS & UNREGULATED CONTAMINANTS: |
* Secondary standards are non-mandatory guidelines established by the EPA to assist utilities in managing drinking water for aesthetic considerations, such as taste, odor, and color. These contaminants are not considered to present a risk to human health at the SMCL.
|
Contaminant |
SMCL |
Average of All Samples |
Maximum of All Samples |
2021 System Wide Range |
Possible Source |
Chloride (ppm) |
250 ppm |
44 ppm |
79 ppm |
16 - 79 ppm |
Natural deposits; water treatment additive |
Hardness (ppm) |
N/A |
360 ppm |
430 ppm |
280 - 430 ppm |
Erosion of natural deposits; leaching |
Iron (ppm) |
0.3 ppm |
0.078 ppm |
0.54 ppm |
ND - 0.54 ppm |
Erosion of natural deposits; leaching |
pH (Standard Units) |
6.5 - 8.5 |
7.7 |
7.9 |
7.3 - 7.9 |
|
Manganese (ppm) |
0.05 ppm |
0.015 ppm |
0.085 ppm |
ND - 0.085 ppm |
Erosion of natural deposits; leaching |
Nickel (ppb) |
N/A |
ND |
ND |
ND |
Erosion of natural deposits; leaching |
Silver (ppb) |
100 ppb |
3.1 ppb |
9.2 ppb |
ND - 9.2 ppb |
Naturally present in the environment |
Sodium (ppm) |
N/A |
28 ppm |
37 ppm |
21 - 37 ppm |
Erosion of natural deposits; leaching |
Sulfate (ppm) |
250 ppm |
88 ppm |
180 ppm |
2.4 - 180 ppm |
Erosion of natural deposits; leaching |
Zinc (ppb) |
5000 ppb |
12 ppb |
35 ppb |
ND - 35 ppb |
Natural Deposits |