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Water Analysis Interpretive Guidelines

GUIDELINES FOR INTERPRETATION OF WATER ANALYSIS

     

Range

   

Constituent

Very Low

Low

Medium

High

Very High

Carbonate, mg/L

0 – 2

2 – 5

5 – 10

10 – 20

20+

Bicarbonate, mg/L

0 – 50

50 – 100

100 – 200

200 – 400

400+

Calcium, mg/L

0 – 25

25 – 50

50 – 75

75 – 100

100+

Magnesium, mg/L

0 – 10

10 – 20

20 – 30

30 – 40

40+

Potassium, mg/L

0 – 10

10 – 20

20 – 30

30 – 40

40+

Sodium, mg/L

0 – 10

10 – 25

25 – 50

50 – 75

75+

Nitrate-N, mg/L

0 – 1

1 – 5

5 – 8

8 – 10

10+

Sulfate-S, mg/L

0 – 10

10 – 20

20 – 40

40 – 80

80+

Phosphate-P, mg/L

0 – 0.10

0.10 – 0.20

0.20 – 0.40

0.40 – 0.80

0.80+

Zinc, mg/L

0 – 0.10

0.10 – 0.20

0.20 – 0.50

0.50 – 5.00

5.00+

Copper, mg/L

0 – 0.05

0.05 – 0.10

0.10 – 0.20

0.20 – 0.30

0.30+

Manganese, mg/L

0 – 0.01

0.01 – 0.02

0.02 – 0.03

0.03 – 0.05

0.05+

Iron, mg/L

0 – 0.05

0.05 – 0.10

0.10 – 0.20

0.20 – 0.30

0.30+

Boron, mg/L

0 – 0.05

0.05 – 0.10

0.10 – 0.20

0.20 – 1.00

1.00+

Chloride, mg/L

0 – 10

10 – 25

25 – 50

50 – 250

250+

Total Dissolved Solids, mg/L

0 – 150

150 – 300

300 – 500

500 – 700

700+

pH

0 – 6.5

6.5 – 7.0

7.0 – 8.0

8.0 – 8.5

8.5+

Conductivity, mg/L

0 – 0.23

0.23 – 0.46

0.46 – 0.78

0.78 – 1.09

1.09+

Fluoride, mg/L

0 – 0.30

0.30 – 0.70

0.70 – 1.20

1.20 – 2.00

2.00+

Hardness, mg/L

0 – 60

60 – 120

120 – 180

180 – 240

240+

Hardness, grains/gallon

0 – 3.5

3.5 – 7.0

7.0 – 10.5

10.5 – 14.0

14.0+

Salinity Hazard

0 – 0.20

0.20 – 0.75

0.75 – 1.50

1.50 – 3.00

3.00+

Sodium Hazard

Refer to back of water analysis report form.

 

These guidelines have been categorized into very low, low, medium, high, and very high by American Agricultural Laboratory. The ranges are based on analysis performed by the laboratory.