Interpreting Water Quality Reports
Upcoming SlideShare
Loading in...5
×
 

Interpreting Water Quality Reports

on

  • 383 views

Slides from a presentation February 17, 2011 at the Wyoming Groundskeepers and Growers Association annual conference.

Slides from a presentation February 17, 2011 at the Wyoming Groundskeepers and Growers Association annual conference.

Statistics

Views

Total Views
383
Views on SlideShare
383
Embed Views
0

Actions

Likes
0
Downloads
2
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Interpreting Water Quality Reports Interpreting Water Quality Reports Presentation Transcript

  • Interpreting WaterQuality Reports
    Karen L. Panter, Ph.D., C.P.H.
    Horticulture and Specialty Crops
    Department of Plant Sciences
  • How do we measure water quality?
    Alkalinity
    Salinity
    pH
    Sodium Adsorption Ratio
    Specific Ions
    Suspended Solids
  • Desirable Characteristics
    EC
    <0.5 dS
    pH
    5.0 – 7.0
    Alkalinity
    40 – 100 ppm
    Nitrate
    <5 ppm
    Magnesium
    <24 ppm
    Ammonium
    <5 ppm
    Phosphorus
    <5 ppm
    Potassium
    <10 ppm
    Calcium
    <120 ppm
    Sulfates
    < 240 ppm
    View slide
  • Desirable Characteristics
    Manganese
    <2 ppm
    Iron
    <5 ppm
    Boron
    <0.8 ppm
    Copper
    <0.2 ppm
    Zinc
    <5 ppm
    Molybdenum
    <0.02 ppm
    Aluminum
    <5 ppm
    Sodium
    <50 ppm
    SAR
    <4
    Chloride
    <140 ppm
    Fluoride
    <1 ppm
    View slide
  • Desirable Characteristics
    5
  • pH
    A pH reading is a measurement of the hydrogen ion concentration of a solution
    0 most acid to 14 most basic
    pH = 7 is neutral
    pH = 5.4 to 7.0 acceptable
  • Salinity
    Total dissolved solids
    Measured by electrical conductivity
    determined by passing a current through the solution and determining its electrical conductance
    units are millimhos/cm, or
    decisiemens/meter (dS/m)
  • Salinity
    Restrictions to use:
    < 0.25 dS/m None
    0.25-0.75 dS/m Moderate
    0.75-2.25 dS/m High
    > 2.26 dS/m Severe
    Multiply by 700 to convert to ppm TDS
    Total Dissolved Solids
  • Alkalinity
    The ability to neutralize acid (meq·L-1) or ppm (upper limits)
    total carbonates (CO3 )
    bicarbonates (HCO3)
    hardness (Ca + Mg)
    Restrictions to use (in meq·L-1):
    < 2 None
    2-8.5 Slight to moderate
    > 8.5 Severe
  • SAR - Sodium Adsorption Ratio
    Relates sodium to calcium and magnesium levels in water
    Must be done by water testing laboratory
    Can lead to deficiencies in calcium and magnesium
  • Sodium Adsorption Ratio
    High sodium in relation to calcium and magnesium can be detrimental to plant growth
    SAR should be < 10
    Greenhouse < 4
    Calcium may precipitate
  • Examples of Real Analyses
    12
  • 13
    1
  • 14
    1
  • 15
    1
  • 16
    2
  • 17
    2
  • 18
    3
  • 19
    3
  • 20
    4
  • 21
    4
  • 22
    5
  • 23
    5
  • 24
    6
  • 25
    7
  • 26
    8
  • 27
    9
  • 28
    9
  • 29
    10
  • 30
    10
  • 31
    11
  • 32
    11
  • And now….any questions?
    33