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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, Calendar Year 2020

ConstituentUnit Average Range
pHstandard unit7.47.2 - 7.6
Alkalinity (as CaCO3)mg/L238220 - 250
Total Hardness (as CaCO3)mg/L185150 - 200
Calciummg/L3831 - 46
Magnesiummg/L2318 - 24
Manganeseug/L5342 - 64
Potassiummg/L1716 - 19
Sodiummg/L163140 - 190
Conductivityµmhos/cm15161414 - 1664
Total Dissolved Solidsmg/L724670 - 790
Chloridemg/L198120 - 289
Sulfatemg/L196170 - 240
Silica (as SiO2)mg/L1715 - 20
Total Nitrogenmg/L4842 - 53
Total Kjeldahl Nitrogenmg/L4741 - 52
Ammoniamg/L4136 - 47
Nitrate (as N)mg/L2.070.83 - 7.10
Nitrite (as N)mg/L1.630.03 - 6.70
Phosphatemg/L0.180.03 - 0.88
Total Coliform BacteriaMPN 1.4<1 - 37.3
TurbidityNTU 0.710.26 - 1.28

Abbreviations:

mg/L = milligrams per liter

µmhos = microhms per centimeter

µg/L = micrograms per liter

MPN = most probable number

NTU = Nephelometric Turbidity Units