In California, your local water district has to publish an annual water quality report. Assuming you use Desert Water, their annual report has your groundwater pH at 8, which is high, but not too bad. Your hardness is 230 mg/L however, which is very hard indeed. Also your water is moderately high in sodium (which again is not unusual in SoCal) so you have to be sure that when you water you water deeply and flush out the soil. If you water frequently in small amounts, the water can dry within the soil and your plants can start to show symptoms of salt toxicity as sodium builds up in your soil. Been there, done that.
Consider using an acid fertilizer which will help counteract the effects of high pH in your water, and will prevent iron and manganese deficiency issues. I used to use Super Iron 9-9-9 because it was a product a lot of Southern California citrus growers used.
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Best Super Iron Plant Food is an iron rich fertilizer that helps counteract Alkaline soil and enables plants to overcome iron-induced chlorosis. The Iron in Best Super Iron Plant Food is part of a homogeneous pellet which virtually eliminates the possibility of staining concrete. Super Iron also promotes good health, slower growth, and great color.