Copper and Lead
|
|
EPA Action Level mg/L |
EPA Limit MCLG |
Sample Date |
Possible Sources |
|
Analyte |
Units |
90th Percentile Reported |
Groundwater Maximum Concentrations |
|
Copper |
mg/L |
.043 |
ND |
1.3 |
1.3 |
2006 |
Erosion from natural deposits, home
plumbing systems. |
|
Lead |
mg/L |
0.4 |
ND |
0.015 |
0 |
2006 |
Erosion of natural deposits, home
plumbing systems. |
Samples were
collected from 13 homes as required in our approved
sampling plan.
Disinfection Products
|
Analyte |
Units |
Water System Concentrations |
EPA Limit MCL |
EPA MCLG |
Sample Date |
Possible Sources |
|
|
|
Range |
Highest |
|
|
|
|
|
Total Trihalomethanes |
ug/L |
ND-3.5 |
3.5 |
80 |
NA |
2006 |
By-product of drinking water
chlorination |
|
Total Haloacetic Acids |
ug/L |
ND |
ND |
60 |
NA |
2006 |
By-product of drinking water
chlorination |
Quintero Area Water
System Water Quality Data
Refer to notes on
page 15 for explanation of units,
definitions, and abbreviations.
Text in orange language
required by the US Environmental Protection Agency.
Inorganics
|
Analyte |
Units |
Groundwater Concentrations |
EPA Limit MCL |
EPA
Limit
MCLG |
Sample Date |
Possible Sources |
|
|
|
Range |
Highest |
|
|
|
|
|
Arsenic |
mg/L |
0.002-0.004 |
0.004 |
0.01 |
0 |
2006 |
Erosion of natural deposits |
|
Barium |
mg/L |
0.03-0.15 |
0.15 |
2 |
2 |
2006 |
Erosion of natural deposits
|
|
Fluoride |
mg/L |
0.39-0.78 |
0.78 |
4 |
NA |
2006
|
Erosion of natural deposits
|
|
Nitrate |
mg/L |
ND |
ND |
10 |
10 |
2006 |
Fertilizer runoff, erosion of natural deposits
|
|
Sulfate
|
mg/L |
270-310 |
310 |
NA |
NA |
2006
|
Erosion of natural deposits
|
|
Selenium |
mg/L |
ND |
ND |
0.05 |
0.05 |
2006
|
Erosion of natural deposits discharge
from mines
|
Tested for but
not found: Asbestos; Antimony; Beryllium; Cadmium;
Chromium; Cyanide; Mercury; Nitrite; Thallium
Due to the variation of the
arsenic concentration, the City is providing the
following statement 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.