REGULATED SUBSTANCES
Substance (Units) |
Year Sampled |
MCL |
MCLG |
Amount Detected |
Range Low-High |
Violation |
Typical Source |
Nitrate (ppm) |
2000 |
10 |
10 |
0.21 |
0.76 - 2.1 |
No |
Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits |
Trichloroethylene (ppb) |
2000 |
5 |
0 |
31 |
NA |
No |
Discharge from metal degreasing sites and other factories |
TTHMs [Total trihalomethanes] (ppb) |
2000 |
100 |
NA |
4 |
0 - 16 |
No |
By-product of drinking water chlorination |
LEAD AND COPPER
(Tap water samples were collected from 30 homes in the service area. None were found to exceed the AL.)
Substance (Units) |
Year Sampled |
AL |
MCLG |
Amount Detected (90th Percentile) |
No. of Homes Above AL |
Violation |
Typical Source |
Copper (ppm) |
2000 |
1.3 |
1.3 |
1.2 |
1 |
No |
Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives |
Lead (ppb) |
2000 |
15 |
0 |
3 |
0 |
No |
Corrosion of household plumbing systems; Erosion of natural deposits |
UNREGULATED SUBSTANCES
Substance (Units) |
Year Sampled |
Amount Detected |
Range Low-High |
Typical Source |
Bromodichloromethane (ppb) |
2000 |
22 |
1 - 2 |
Formed when natural organic material present in the water reacts with chlorine added as a disinfectant |
Bromoform (ppb) |
2000 |
12 |
0 - 1 |
Formed when natural organic material present in the water reacts with chlorine added as a disinfectant |
Chlorodibromomethane (ppb) |
2000 |
22 |
1 - 2 |
Formed when natural organic material present in the water reacts with chlorine added as a disinfectant |
Chloroform (ppb) |
2000 |
12 |
0 - 1 |
Formed when natural organic material present in the water reacts with chlorine added as a disinfectant |
Methyl tertiary-Butyl Ether (ppm) |
2000 |
23 |
0 - 2 |
Leaking underground gasoline storage tanks, motorized (two-stroke engine) on reservoirs |
Sodium (ppm) |
2000 |
41 |
30 - 61 |
Naturally present; Discharged from salting of roads |
TABLE DEFINITIONS
* Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
* Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
* Maximum Contaminant Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
* NA: Not applicable.
* Parts per billion (ppb): One part per billion (or micrograms per liter) is equivalent to one penny in $10,000,000.
* Parts per million (ppm): One part per million (or milligrams per liter) is equivalent to one penny in $10,000.
TABLE FOOTNOTES
1 Detected at the Riverneck RD #'s 1 and 2 wells.
2 Detected at the Jordan RD and Turnpike RD wells.
3 Detected at the Riverneck RD #1&2 and Turnpike RD wells.
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