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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 2015

ConstituentUnit Average Range
pHstandard unit7.26.8 - 7.5
Alkalinity (as CaCO3)mg/L278250 - 310
Total Hardness (as CaCO3)mg/L230200 - 260
Calciummg/L5343 - 80
Magnesiummg/L2924 - 48
Manganesemg/L8065 - 100
Potassiummg/L2116 - 34
Sodiummg/L211180 - 380
Conductivityµmhos/cm18321642 - 2800
Total Dissolved Solidsmg/L924740 - 1600
Chloridemg/L274210 - 500
Sulfatemg/L200160 - 230
Silica (as SiO2)mg/L2016 - 26
Total Nitrogenmg/L 4540 - 51
Total Kjeldahl Nitrogenmg/L 4438 - 48
Ammoniamg/L 4134 - 46
Nitrate (as N)mg/L1.430.32 - 3.2
Nitrite (as N)mg/L 1.330.33 - 3.3
Phosphatemg/L0.190.06 - 0.55
Total Coliform BacteriaMPN <2<2 - 2
TurbidityNTU 0.960.48 - 1.45

Abbreviations:

mg/L = milligrams per liter

µmhos = microhms per centimeter

µg/L = micrograms per liter

MPN = most probable number

NTU = Nephelometric Turbidity Units