|
Contaminant and Unit of Measurement |
Dates of sampling (mo/yr) |
Violation YIN |
Level Detected |
Range of Results |
MCLG |
MCL |
Likely Source of Contamination |
|||||||||||||||||||
|
Barium (ppm) |
05 / 2018 |
N |
0.0152 |
N/A |
2 |
2 |
Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits |
|||||||||||||||||||
|
Chromium (ppb) |
05 / 2018 |
1.5 |
N/A |
100 |
100 |
Discharge from steel and pulp mills; erosion of natural deposits |
||||||||||||||||||||
|
Fluoride (ppm) |
05 / 2018 |
0.396 |
N/A |
4 |
4.0 |
Erosion of natural deposits; discharge from fertilizer and aluminum factories. Water additive which promotes strong teeth when at the o timum level of 0.7 ppm |
||||||||||||||||||||
|
Sodium (ppm) |
05 / 2018 |
11.1 |
N/A |
N/A |
160 |
Salt water intrusion, leaching from |
||||||||||||||||||||
|
Nickel (ppb) |
05 / 2018 |
2.5 |
N/A |
N/A |
100 |
Pollution from mining and refining operations. Natural occurrence in soil |
||||||||||||||||||||
|
Nitrate (as Nitrogen) (ppm) |
04 / 2020 |
N |
0.3410 |
N/A |
10 |
10 |
Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits |
|||||||||||||||||||
|
Disinfectant and Unit of Measurement |
Dates of sampling (mo./yr.) |
MRDL Violation YIN |
Level Detected |
Rangé of Results |
MRDLG |
MRDL |
Likely Source of Contamination |
|||||||||||||||||||
|
Ch101ine (ppm) |
Monthly 2020 |
2.74 |
2.07-2.95 |
4 |
4.0 |
Water additive used to control microbes |
||||||||||||||||||||
|
Stage 2 Disinfectants and Disinfection By-Produéts |
||||||||||||||||||||||||||
|
Contaminant and Unit of Measurement |
Dates of sampling (mo/yr) |
MCL Violation (Y/N) |
Detected |
Range of Results |
MCLG |
MCL |
Likely Source of Contamination |
|||||||||||||||||||
|
Total Trihalomethanes (TTHM) System (ppb) |
Quarterly 2020 |
59.58 |
37.4 -58 9 |
80 |
By-product of drinking water disinfection |
|||||||||||||||||||||
|
Haloacetic Acids (HAAS) (ppb) |
Quarterly 2020 |
23.65 |
10.4 0 |
N/A |
60 |
By-product of drinking water disinfection |
||||||||||||||||||||
|
Lead and Co |
||||||||||||||||||||||||||
|
Contaminant and Unit of Measurement |
Dates of sampling (mo./yr.) |
AL Exceeded (YIN) |
Percentile Result |
No. of sampling sites exceeding the AL |
MCLG |
(Action Level |
Likely Source of Contamination |
|||||||||||||||||||
|
Copper (tap water) (ppm) |
07 / 2019 |
0.0579 |
0/20 |
1.3 |
1.3 |
Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives |
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Ifpresent, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. Big Bend Water Authority is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using waterfor drinking or cooking. Ifyou are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is availablefrom the Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead.
