|
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 |
2005 |
By-product of drinking water ozonation |
|
Chlorite |
mg/L |
ND-0.015 |
0.015 |
NR |
NR |
0.012-0.29 |
0.29 |
1 |
0.8 |
2005 |
By-product of chlorine dioxide for oxidation |
|
Total Organic Carbon |
mg/L |
NR |
NR |
2.1-3.4 |
3.4 |
2.19-4.59 |
4.59 |
TT |
NA |
2005 |
Naturally present in the environment |
|
Total Trihalomethanes |
µg/L |
ND-156* |
156* |
24-75 |
75 |
26-75 |
75 |
80 |
NA |
2005 |
By-product of drinking water chlorination |
|
Total Haloacetic Acids |
µg/L |
ND-126* |
126* |
ND-20 |
20 |
6-34 |
34 |
60 |
NA |
2005 |
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 |
0.003-0.011 |
0.011 |
0.001-0.008 |
0.008 |
ND |
ND |
0.05 |
0 |
2005 |
Erosion of natural deposits |
|
Barium |
mg/L |
ND-0.04 |
0.04 |
0.059 |
0.059 |
0.113 |
0.113 |
2 |
2 |
2004-05 |
Erosion of natural deposits
|
|
Cadmium |
mg/L |
ND-0.0012 |
0.0012 |
ND |
ND |
ND |
ND |
0.005 |
0.005 |
2004-05 |
Erosion of natural deposits
|
|
Chromium |
mg/L |
ND-0.005 |
0.005 |
0.0027 |
0.0027 |
ND |
ND |
0.1 |
0.1 |
2004-05 |
Erosion of natural deposits
|
|
Fluoride |
mg/L |
0.4-1.9 |
1.9 |
0.15-0.77 |
0.77 |
0.36 |
0.36 |
4 |
NA |
2004-05 |
Erosion of natural deposits
|
|
Nitrate |
mg/L |
0.89-9.25 |
9.25
|
0.46 |
0.46 |
ND |
ND |
10 |
10 |
2005 |
Fertilizer runoff, erosion of natural deposits
|
|
Selenium |
mg/L |
ND-0.002 |
0.002 |
ND |
ND |
ND |
ND |
0.05 |
0.05 |
2004-05 |
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. The wells are located at 11940 N 75th Ave, 8301 N
103rd Ave, 14017 N 73rd Ave, 8451 W Bell Rd, and 8897 W
Beardsley Rd. 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 2005. Some of these
wells contain arsenic above the new MCL of 0.010 mg/L that
was effective January 23, 2006. Those wells exceeding the
new MCL have been shut down. Peoria is evaluating its arsenic
treatment options and has developed a compliance strategy to
meet the new MCL.
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. |
