This regional map shows the Agency boundaries in relation to California, and includes the Pajaro and Salinas River Watersheds.
Monitoring Protocol
The Pajaro Valley Water Management Agency 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), the PVWMA 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 average water quality of select constituents sampled from a rotation of active turnouts along the distribution system for the most recent three quarters, and for all the samples collected since the beginning of blended recycled water deliveries to present. To view a print friendly table with results going back to Spring, 2009, click here (PDF ~ 150 KB).
|
Q2 - 2012 |
Q3 - 2012 |
Q4 - 2012 |
Running Average |
|---|---|---|---|---|
|
||||
Number of Samples Analyzed | 38 | 33 | 14 | 353 |
|
||||
Sodium (mg/L) | 82 | 93 | 108 | 94 |
|
||||
Chloride (mg/L) | 87 | 103 | 136 | 104 |
|
||||
Nitrate as NO3 (mg/L) | 28 | 15 | 19 | 24 |
|
||||
Total Dissolved Solids (mg/L) | 578 | 592 | 662 | 612 |
|
||||
Specific Conductance (dS/cm) | 0.98 | 1.09 | 1.20 | 1.04 |
|
||||
Sodium Adsorption Ratio (SAR: unit-less) | 2.30 | 2.53 | 3.02 | 2.55 |
*Table last updated October 17, 2012 and reflects sample results throughSeptember 30, 2012.
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 PVWMA Water Quality and Project 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 PVWMA at 831-722-9292, or by
email: info@pvwma.dst.ca.us
