Water Quality Data
Other Parameters That May be of Interest
Although sodium and hardness do not have MCLs, they are of interest to many consumers who are concerned about sodium intake and may believe that the hardness of the water could affect their health. Therefore, monitoring is required by CDPH and results are presented in this Annual Drinking Water Quality Report.
Sodium refers to the salt present in the water and is generally naturally occurring. Hardness is the sum of polyvalent cations present in the water, which is essentially the sum of magnesium and calcium. These cations are usually naturally occurring.
| UNITS | MCL | PHG (MCLG) | CSD MDL | CITY OF SAN DIEGO TREATMENT PLANTS |
MWD SKINNER TREATMENT PLANT |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ALVARADO | MIRAMAR | OTAY | ||||||||||
| AVERAGE | RANGE | AVERAGE | RANGE | AVERAGE | RANGE | AVERAGE | RANGE | |||||
| Sodium | ppm | n/a | n/a | 20 | 73.4 | 63.5 - 83.8 | 74.7 | 61.7 - 84.3 | 99.4 | 91.7 - 109 | 80 | 78 - 81 |
| Total Hardness | ppm | n/a | n/a | 10 | 209 | 142 - 243 | 214 | 136 -249 | 241 | 233 - 252 | 230 | 230 - 240 |
| Total Hardness | gr/Gal | n/a | n/a | 0.6 | 12.2 | 8.3 - 14.2 | 12.5 | 8.0 - 14.6 | 14.1 | 13.6 - 14.7 | 13.4 | 13.4 - 14.0 |
| Alkalinity - Total as CaCO3 | ppm | n/a | n/a | 10 | 106 | 74.2 - 123 | 98.2 | 74.4 - 114 | 130 | 116 - 150 | 110 | 72 - 130 |
| pH | pH | n/a | n/a | n/a | 8.14 | 7.15 - 8.67 | 8.19 | 6.90 - 8.60 | 8.11 | 6.96 - 8.88 | 8.2 | 8.2 |
| Ammonia as Nitrogen | ppm | n/a | n/a | 0.03 | 0.69 | 0.48 - 0.99 | 0.60 | 0.39 - 0.85 | 0.61 | 0.48 - 0.82 | n/a | n/a |