2023 Water Quality Data Table (continued)
Number of Samples Exceeds AL
Sample Month & Year
Violation Yes/No
90th Percentile
Lead & Copper
Location(s)
AL
ALG
Likely Source of Contaminant
Corrosion of household plumbing systems; Erosion of natural deposits Corrosion of household plumbing systems; Erosion of natural deposits
Lead c (ppb)
0 c
N
< 5
15
0
Sep-23
10 Representative Sample Sites
0 d
Copper d (ppm)
N
0.086
1.3
1.3
Sep-23
Table Footnotes
a
If the results for Alpha emitters is above 5 pCi/L, an additional test for radium would be required.
b
If the results for Alpha emitters is above 15 pCi/L, an additional test for uranium would be required.
c
90% of the samples taken had a detected amount of <0.0050 ppm or 5 ppb. None of the samples taken exceeded the action level.
d
90% of the samples taken had a detected amount of 0.086 or less. None of the samples taken exceeded the action level.
Definitions
MCL MCLG MRL MREM
Maximum Contaminant Level (MCL) - The highest level of a contaminant allowed in drinking water Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drinking water below which there is no known or expected risk to health Minimum Reporting Limit (MRL) - The smallest measured concentration of a substance that can be reliably measured by a given analytical method Millirems Per Year (MREM) - A measure of radiation absorbed by the body
AL TT
Action Level -The concentration of a contaminant, which, if exceeded, triggers treatment or other requirements, which a water system must follow.
Treatment Technique - A treatment technique is a required process intended to reduce the level of a contaminant in drinking water.
ppb
Parts per billion or Micrograms per Liter (ug/L)
ppm
Parts per million or Milligrams per Liter (mg/L)
pCi/1
Picocuries per liter - Measure of the radioactivity in water
P/A
Presence/Absence
ND or <
No Detect - Not detectable at reporting limit
N/A
Not Applicable - Sampling was not completed by regulation or was not required
µg/L
Micrograms per liter (1 = 1000 mg/L)
Level 1 Assessment
A study of the water system to identify potential problems to determine (if possible) why total coliform was present
Level 2 Assessment
A very detailed study of the water system to identify potential problems and determine (if possible) why an E. coli MCL violation has occurred and/or why total coliform was present
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