Recycled Water Quality Data

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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 2015

Constituent Unit   Average  Range
pH standard unit 7.2 6.8 - 7.5
Alkalinity (as CaCO3) mg/L 278 250 - 310
Total Hardness (as CaCO3) mg/L 230 200 - 260
Calcium mg/L 53 43 - 80
Magnesium mg/L 29 24 - 48
Manganese mg/L 80 65 - 100
Potassium mg/L 21 16 - 34
Sodium mg/L 211 180 - 380
Conductivity µmhos/cm 1832 1642 - 2800
Total Dissolved Solids mg/L 924 740 - 1600
Chloride mg/L 274 210 - 500
Sulfate mg/L 200 160 - 230
Silica (as SiO2) mg/L 20 16 - 26
Total Nitrogen mg/L  45 40 - 51
Total Kjeldahl Nitrogen mg/L  44 38 - 48
Ammonia mg/L  41 34 - 46
Nitrate (as N) mg/L 1.43 0.32 - 3.2
Nitrite (as N) mg/L  1.33 0.33 - 3.3
Phosphate mg/L 0.19 0.06 - 0.55
Total Coliform Bacteria MPN  <2 <2 - 2
Turbidity NTU  0.96

0.48 - 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


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