Table 4.

Irrigation water quality specifications [32].

Potential Irrigation Problem	Units	The Degree of Restriction on the Use
		None	Slight to Moderate	Severe
Electrical conductivity at 25 °C	dS/m	<0.7	0.7–3	>3
Boron	mg/L	<0.7	0.7–3	>3
NO3	mg/L	<5	5–30	>30
Chloride	mg/L	<4	4–10	>10
Dissolved oxygen	mg/L	-	-	-
Chemical oxygen demand	mg/L	-	-	-
Escherichia coli	cfu/100 mL	-	-	-
pH		Normal range 6.5–8.4