Drinking Water

The City of Woodland’s water has changed from a groundwater source to treated surface water from the Sacramento River. This table lists some of the water quality substances that have improved since switching to treated surface water.

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Water Quality Substances

Water Quality Parameter
Groundwater
Treated Surface Water
Percentage of Reduction
Alkalinity (milligram / Liter as CaCO3)
338
65
80.80%
Boron (milligram / Liter)
2.35
0 (none detect)
100%
Chlorine (max limit is 4.0)
0.3 - 0.5
0.5 - 1.0
40 - 50% increased
Chloride (milligram / Liter)
73
20
72.60%
Chromium VI (ppb)
18
0 (none detected)
100%
Lead (milligram / Liter)
0 (none detected)
0 (none detected)
None detected
Magnesium (milligram / Liter)
48
6
87.50%
Nitrate (as N) (milligram / Liter)
20 - 40
0.23
99.20%
pH
8.0 - 8.1
7.9 - 8.2
No significant change
Sodium (milligram / Liter)
60
19
68.30%
Specific Conductance (EC)
926
200
78.40%
Sulfate (milligram / Liter)
38
7.6
80%
TDS (milligram / Liter)
531
120
77.40%
Total Hardness as CACO3 (milligram / Liter)
382 (22 grains)
56 (3.5 grains)
84.10%