Recycled Water Quality Data
Recycled water produced by Delta Diablo meets all regulatory requirements for unrestricted non-potable reuse.
The Delta Diablo laboratory tests the parameters listed in the table on a monthly or quarterly basis to ensure recycled water meets the needs of our industrial and landscape irrigation customers.
Recycled Water Quality Data, the Calendar Year 2019
| Constituent | Unit | Average | Range |
|---|---|---|---|
| pH | standard unit | 7.5 | 7.2 - 7.7 |
| Alkalinity (as CaCO3) | mg/L | 243 | 220 - 280 |
| Total Hardness (as CaCO3) | mg/L | 190 | 170 - 210 |
| Calcium | mg/L | 43 | 37 - 58 |
| Magnesium | mg/L | 20 | 16 - 23 |
| Manganese | ug/L | 72 | 58 - 89 |
| Potassium | mg/L | 17 | 15 - 20 |
| Sodium | mg/L | 145 | 120 - 160 |
| Conductivity | µmhos/cm | 1439 | 1295 - 1548 |
| Total Dissolved Solids | mg/L | 681 | 610 - 730 |
| Chloride | mg/L | 192 | 160 - 300 |
| Sulfate | mg/L | 212 | 160 - 260 |
| Silica (as SiO2) | mg/L | 20 | 17 - 23 |
| Total Nitrogen | mg/L | 48 | 37 - 55 |
| Total Kjeldahl Nitrogen | mg/L | 47 | 37 - 54 |
| Ammonia | mg/L | 41 | 37 - 45 |
| Nitrate (as N) | mg/L | 1.87 | 0.51 - 4.70 |
| Nitrite (as N) | mg/L | 0.65 | 0.12 - 2.00 |
| Phosphate | mg/L | 0.22 | 0.05 - 0.52 |
| Total Coliform Bacteria | MPN | 1.5 | <1 - 27 |
| Turbidity | NTU | 0.83 | 0.30 - 2.53 |
Abbreviations:
mg/L = milligrams per liter
µmhos = microhms per centimeter
µg/L = micrograms per liter
MPN = most probable number
NTU = Nephelometric Turbidity Units