Central Area Water
System Water Quality Data (Cont.)
|
Analyte
|
Units
|
Water
System Concentrations
|
Greenway Surface Water Concentrations
|
Pyramid Peak Surface Water Concentrations
|
EPA Limit MCL
|
EPA Limit MCLG
|
Sample Date
|
Possible Sources
|
|
|
|
Range |
Highest |
Range |
Highest |
Range |
Highest |
|
|
|
|
|
Bromate |
µg/L |
NR |
NR |
ND |
ND |
NR |
NR |
10 |
0 |
2006 |
By-product of drinking water ozonation |
|
Chlorite |
mg/L |
NR |
0.015 |
NR |
NR |
NR |
NR |
1 |
0.8 |
2006 |
By-product of chlorine dioxide for oxidation |
|
Total Organic Carbon |
mg/L |
NR |
NR |
.05-3.1 |
3.1 |
2.27 |
2.27 |
TT |
NA |
2006 |
Naturally present in the environment |
|
Total Trihalomethanes |
µg/L |
ND-109* |
156* |
36-70 |
70 |
8.7-60.4 |
60.4 |
80 |
NA |
2006 |
By-product of drinking water chlorination |
|
Total Haloacetic Acids |
µg/L |
ND-39* |
126* |
7.5-11 |
11 |
5.9-15.3 |
15.3 |
60 |
NA |
2006 |
By-product of drinking water chlorination |
* A single analysis above the MCL is not a violation. Compliance is determined on a running annual average.
|
Analyte |
Units |
Groundwater Concentrations |
Greenway Surface Water Concentrations |
Pyramid Peak Surface Water Concentrations |
EPA Limit MCL |
EPA
Limit
MCLG |
Sample Date |
Possible Sources |
|
|
|
Range |
Highest |
Range |
Highest |
Range |
Highest |
|
|
|
|
|
Arsenic |
mg/L |
ND-0.02 |
0.02 |
0.001-0.008 |
0.008 |
ND |
ND |
0.01 |
0 |
2006 |
Erosion of natural deposits |
|
Barium |
mg/L |
ND-0.04 |
0.04 |
0.059 |
0.059 |
0.153 |
0.153 |
2 |
2 |
2004-06 |
Erosion of natural deposits
|
|
Cadmium |
mg/L |
ND |
ND |
ND |
ND |
ND |
ND |
0.005 |
0.005 |
2004-06 |
Erosion of natural deposits
|
|
Chromium |
mg/L |
ND |
ND |
0.0027 |
0.0027 |
ND |
ND |
0.1 |
0.1 |
2004-06 |
Erosion of natural deposits
|
|
Fluoride |
mg/L |
ND-1.9 |
1.9 |
0.57-0.79 |
0.79 |
0.36 |
0.38 |
4 |
NA |
2004-06 |
Erosion of natural deposits
|
|
Nitrate |
mg/L |
11.4 |
11.4
|
0.88 |
0.88 |
ND |
ND |
10 |
10 |
2006 |
Fertilizer runoff, erosion of natural deposits
|
|
Selenium |
mg/L |
ND |
ND |
ND |
ND |
ND |
ND |
0.05 |
0.05 |
2004-06 |
Erosion of natural deposits
|
Tested for but not found in Pyramid Peak: Asbestos; Antimony; Beryllium; Cyanide; Mercury; Nitrite; Nickel; Selenium; Thallium
Tested for but not found in Peoria: Asbestos; Antimony; Beryllium; Cyanide; Mercury; Nitrite; Thallium
Nitrate: The City of Peoria has five wells with nitrate concentrations above 5.0 mg/L but less than the MCL
of 10.0 mg/L.
Nitrate in drinking water at levels above 10 mg/L is a
health risk for infants of less than six months of age.
High nitrate levels in drinking water can cause blue
baby syndrome. Nitrate levels may rise quickly for short
periods of time because of rainfall or agricultural
activity. If you are caring for an infant, ask advice
from your health care provider.
Arsenic Information: The City of Peoria obtained about 24% of its water from groundwater wells during 2006. Some of these wells
contain arsenic above a new MCL of 0.01 mg/L that was effective January 23, 2006. Peoria has evaluated its arsenic treatment options
and is developing a compliance strategy.
Due to the variation of the arsenic concentration, the City is providing the following statements as required by the US Environmental
Protection Agency (EPA):
Arsenic Educational Statement: While your drinking water meets EPA’s standard for arsenic, it does contain low levels of arsenic.
EPA’s standard balances the current understanding of arsenic’s possible health effects against the costs of removing arsenic from
drinking water. EPA continues to research the health effects of low levels of arsenic, which is a mineral known to cause cancer in
humans at high concentrations and is linked to other health effects such as skin damage and circulatory problems.
Arsenic Health Effects Statement: Some people who drink water containing arsenic in excess of the MCL over many years could
experience skin damage or problems with their circulatory system, and may have an increased risk of getting cancer.
|