2023 Water Quality Data Table
Running Annual Average (RAA) or Highest Level Detected
Range of All
Sample Month & Year
MCL Violation Y/N
MCL
MCLG
Likely Source of Contaminant
Radiochemical Contaminants
Location(s)
Samples
(Low
-High)
Alpha Emitters (pCi/L) a& b
Well 5b
4.08
May-23
N
4.08 - 9.7
15
0
Erosion of Natural Deposits
Well 1, 2, 2B, 3 & 4
7
Jul-20
1.59
Well 5b
May-23
Combined Radium 226 & 228 (pCi/L)
<1 - 2.1
5
0
Erosion of Natural Deposits
N
1.5
Well 1, 2, 2B, & 4
Jul-20
Running Annual Average (RAA) or Highest Level Detected
Range of All Samples (Low - High)
Sample Month & Year
Violation Yes/No
Inorganic Contaminants
Location(s)
MCL
MCLG
Likely Source of Contaminant
Erosion of natural deposits, runoff from orchards, runoff from glass and electronics production wastes.
2.1 7.1
Wells 1, 4 & 5b Wells 2 & 2b
May-20 May-23
Arsenic (ppb)
N
1.7 - 8.6
10
0
Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits.
1.02
Wells 1, 4 & 5b Wells 2 & 2b
May-20 May-23
N
0.76 - 1.2
Barium (ppm)
2
2
1.1
1.9 2.6
Discharge from steel and pulp mills; Erosion of natural deposits.
Wells 1, 4 & 5b Wells 2 & 2b
May-20 May-23
100
Chromium (ppb)
N
1.2 - 2.9
100
Erosion of natural deposits; Water additive that promotes strong teeth; Discharge from fertilizer and aluminum factories.
0.053 0.076
Wells 1, 4 & 5b Wells 2 & 2b
May-20 May-23
Fluoride (ppm)
N
0.050 - 0.081
4
4
Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits
Nitrate (ppm)
Wells 1, 2, 2b, 3, 4, 5b, & 8
N
0.10 - 0.20
10
10
May-23
0.15
4.6 3.8
Wells 1, 2, 3, 4 & 8 Wells 2b and 5b
Apr-21 May-23
Sodium (ppm)
N
2.7 - 5.1
N/A
N/A
Erosion of natural deposits
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