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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, the Calendar Year 2019

ConstituentUnit Average Range
pHstandard unit7.57.2 - 7.7
Alkalinity (as CaCO3)mg/L243220 - 280
Total Hardness (as CaCO3)mg/L190170 - 210
Calciummg/L4337 - 58
Magnesiummg/L2016 - 23
Manganeseug/L7258 - 89
Potassiummg/L1715 - 20
Sodiummg/L145120 - 160
Conductivityµmhos/cm14391295 - 1548
Total Dissolved Solidsmg/L681610 - 730
Chloridemg/L192160 - 300
Sulfatemg/L212160 - 260
Silica (as SiO2)mg/L2017 - 23
Total Nitrogenmg/L4837 - 55
Total Kjeldahl Nitrogenmg/L4737 - 54
Ammoniamg/L4137 - 45
Nitrate (as N)mg/L1.870.51 - 4.70
Nitrite (as N)mg/L0.650.12 - 2.00
Phosphatemg/L0.220.05 - 0.52
Total Coliform BacteriaMPN 1.5<1 - 27
TurbidityNTU 0.830.30 - 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