Table D Report
The Metropolitan Water District of Southern California
General Mineral and Physical Analysis of Metropolitan's Water Supplies
September 2025
|
SOURCE WATERS |
TREATMENT PLANT EFFLUENTS |
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|
CONSTITUENTS |
UNITS |
Lake Havasu |
San Jacinto Tunnel |
Lake Mathews |
Castaic Lake |
Silver-Wood Lake |
Lake Perris |
Diamond Valley Lake |
Lake Skinner |
Wey-Mouth |
Diemer |
Jensen |
Skinner |
Mills |
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|
SILICA |
mg/L |
8.9 |
8.4 |
8.2 |
12.2 |
11.0 |
5.3 |
9.1 |
10.3 |
9.2 |
9.2 |
12.5 |
10.1 |
10.9 |
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|
CALCIUM |
mg/L |
74 |
72 |
67 |
30 |
15 |
27 |
24 |
52 |
46 |
50 |
31 |
52 |
15 |
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|
MAGNESIUM |
mg/L |
25 |
26 |
26 |
13 |
8 |
13 |
12 |
20 |
20 |
20 |
13 |
20 |
8 |
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|
SODIUM |
mg/L |
92 |
94 |
98 |
42 |
25 |
54 |
48 |
73 |
85 |
84 |
51 |
82 |
33 |
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|
POTASSIUM |
mg/L |
4.7 |
4.8 |
5.1 |
2.8 |
1.9 |
3.4 |
3.4 |
4.0 |
4.1 |
4.0 |
2.8 |
4.1 |
1.9 |
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|
ALKALINITY,
CARBONATE AS CO3 |
mg/L |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
0 |
2 |
4 |
2 |
0 |
2 |
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|
ALKALINITY,
BICARBONATE AS HCO3 |
mg/L |
167 |
161 |
146 |
110 |
81 |
122 |
94 |
135 |
117 |
118 |
116 |
127 |
73 |
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|
SULFATE |
mg/L |
211 |
213 |
219 |
61 |
16 |
41 |
42 |
146 |
166 |
170 |
69 |
163 |
25 |
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|
CHLORIDE |
mg/L |
95 |
97 |
101 |
48 |
32 |
70 |
60 |
79 |
84 |
84 |
52 |
86 |
39 |
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|
NITRATE |
mg/L |
1.3 |
1.1 |
0.6 |
1.9 |
0.3 |
<0.1 |
<0.1 |
0.3 |
0.6 |
0.5 |
2.0 |
0.3 |
0.8 |
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|
FLUORIDE |
mg/L |
0.3 |
0.3 |
0.3 |
0.2 |
<0.1 |
0.1 |
0.1 |
0.2 |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
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|
TOTAL DISSOLVED
SOLIDS (TDS) |
mg/L |
596 |
597 |
598 |
266 |
150 |
275 |
251 |
452 |
476 |
485 |
294 |
482 |
173 |
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|
TOTAL
HARDNESS AS CaCO3 |
mg/L |
287 |
288 |
281 |
135 |
74 |
123 |
113 |
219 |
205 |
216 |
134 |
218 |
76 |
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|
TOTAL
ALKALINITY AS CaCO3 |
mg/L |
137 |
132 |
120 |
90 |
66 |
100 |
85 |
111 |
100 |
103 |
99 |
104 |
64 |
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|
FREE
CARBON DIOXIDE |
mg/L |
3.7 |
1.8 |
2.4 |
5.9 |
1.7 |
1.2 |
0.3 |
2.6 |
0.6 |
0.5 |
0.5 |
1.4 |
0.3 |
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|
pH |
pH |
7.88 |
8.18 |
8.00 |
7.49 |
7.89 |
8.23 |
8.78 |
7.94 |
8.55 |
8.61 |
8.61 |
8.18 |
8.64 |
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|
SPECIFIC
CONDUCTANCE |
μS/cm |
982 |
988 |
994 |
467 |
268 |
510 |
456 |
767 |
805 |
818 |
509 |
809 |
311 |
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|
COLOR |
CU |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
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|
TURBIDITY |
NTU |
1.3 |
0.43 |
0.79 |
0.77 |
1.2 |
0.68 |
0.59 |
0.75 |
0.04 |
0.03 |
0.03 |
0.05 |
0.04 |
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|
TEMPERATURE |
°C |
25 |
28 |
26 |
15 |
25 |
26 |
19 |
26 |
25 |
27 |
20 |
29 |
25 |
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|
BROMIDE |
mg/L |
0.08 |
0.05 |
0.04 |
0.14 |
0.09 |
0.21 |
0.18 |
0.08 |
-- |
-- |
-- |
-- |
-- |
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|
TOTAL
ORGANIC CARBON |
mg/L |
3.28 |
3.20 |
3.84 |
2.94 |
3.00 |
4.32 |
3.40 |
3.44 |
-- |
-- |
-- |
-- |
-- |
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|
SATURATION
INDEX |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
0.84 |
0.98 |
0.69 |
0.62 |
0.35 |
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|
STATE PROJECT
WATER |
% |
0 |
0 |
0 |
100 |
100 |
100 |
100 |
43 |
44 |
40 |
100 |
42 |
100 |
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