A- A A+
water quality banner

Water Quality Testing

Monitoring Protocol

PV Water and the City of Watsonville closely monitor and test the tertiary treated, disinfected recycled water above and beyond what is required by the Master Reclamation Permit that was issued by the Regional Water Quality Control Board.

Below is a table that shows the constituents analyzed, and at what frequency, as required by the Master Reclamation Permit for the blended recycled water produced at the Recycled Water Facility.

Constituent / Parameter

Units

Sample Type

Sampling Frequency

Daily Flow

mgd

Metered

Continuous

Turbidity

NTU

Metered

Continuous

Total Coliform

MPN/100 mL

Grab

Daily

CBOD

mg/L

24-hr composite

Weekly

Total Suspended Solids

mg/L

24-hr composite

Weekly

Total Nitrogen (as N)

mg/L

Grab

Monthly

Nitrate (as N)

mg/L

Grab

Monthly

Ammonia (as N)

mg/L

Grab

Monthly

pH

Units

Grab

Monthly

Total Dissolved Solids

mg/L

Grab

Monthly

Sodium

mg/L

Grab

Monthly

Chloride

mg/L

Grab

Monthly

Sulfate

mg/L

Grab

Monthly

Boron

mg/L

Grab

Monthly

Going beyond the sampling required by our permit (above), PV Water collects additional samples from a rotation of turnouts along the Coastal Distribution System at a minimum of once per month. These samples are analyzed for constituents relevant to the irrigation of crops. The constituents analyzed are provided in the table below.

Alkalinity, Total (as CaCO3)

Hardness (as CaCO3)

pH (Laboratory)

Total Nitrogen

Bicarbonate (as HCO3-)

Kjehldahl Nitrogen

Potassium

Turbidity

Boron

Langlier Index (60 deg. C)

SAR (Sodium Adsorption Ratio)

 

Bromide

Magnesium

SAR, Adjusted

 

Calcium

Nitrate (as NO3)

Sodium

 

Carbonate (as CaCO3)

Nitrate (as NO3-N)

Specific Conductance (E.C.)

 

Chloride

Nitrite (as NO2-N)

Sulfate

 

Fluoride

o-Phosphate-P

Total Dissolved Solids

 

Water Quality Results

All the water produced at the Recycled Water Facility has been in full compliance with permit regulations since recycled water distribution began.

The table below shows delivered water quality of select constituents based on a weighted quarterly averages of source water and volume. To view a print friendly table of results click here for a PDF.

 

Q2 - 2017

Q3 - 2017

Q4 - 2017

Q1- 2018

System Production (AF)

1,399

1,663

988

460

Sodium (mg/L)

91

114

94

113

Chloride (mg/L)

98

106

115

128

Nitrate as NO3-N (mg/L)

5

8

6

5

Total Dissolved Solids (mg/L)

606

602

618

671

Specific Conductance (dS/cm)

1.02

1.03

1.10

1.20

Sodium Adsorption Ratio (SAR: unit-less)

2.42

2.93

2.50

3.04

090112 CDS Map 150dpi small

Please note the table immediately above represents only a portion of the constituents analyzed by the independent, ELAP certified laboratory. The constituents listed in the table were chosen by the PV Water Water Projects and Facility Operations Committee. This Committee meets monthly and the public is invited to attend. Click here to go to where Committee Meeting agendas are posted.

For additional information, please contact the PV Water at 831-722-9292, or

email:

Contact PV Water

Pajaro Valley Water Management Agency

36 Brennan St.
Watsonville, CA 95076

1 (831) 722-9292

View Our Staff Directory

Quarterly Newsletter