Lake Salinity Report
Reports from the North Palm Beach Improvement District on the lake in Juno Isles

Sodium – Sodium exists in nearly all irrigation water and is not necessarily a cause for concern
unless high concentrations are present. High concentrations (> 70 mg/L) can be detrimental to
both turf and soils. Sodium in irrigation water can be absorbed by roots and foliage, and foliar
burning can occur if sufficient amounts accumulate in leaf tissue. Grasses grown on golf course
putting greens (creeping bentgrass and annual bluegrass) are particularly susceptible to sodium
toxicity because they are mowed very short, irrigated frequently, and subjected to other stresses.

Chloride – Chloride contributes to salinity of irrigation water, and when concentrations are high
enough, can be toxic to plants. Turfgrasses are not particularly sensitive to chloride, and can
tolerate levels up to 100 mg/L. Turfgrasses can sustain injury when irrigated with water containing
>355 mg/L of chloride. Turfgrass managers should be aware that some ornamental plants are
sensitive to chloride concentrations above 70 mg/L.

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Salinity Reports

September 2024
Chloride – 170 mg/L
Sodium – 89 mg/L
August 2024
Chloride – 190 mg/L
Sodium – 96 mg/L
July 2024
Sodium: 110 (mg/L)
Chloride: 210 (mg/L)
June 2024
Sodium: 150 (mg/L)
Chloride: 290 (mg/L)
May 2024
Sodium: 150 (mg/L)
Chloride: 290 (mg/L)
April 2024
Sodium: 160 (mg/L)
Chloride: 320 (mg/L)
March 2024
Sodium: 180 (mg/L)
Chloride: 370 (mg/L)
February 2024
Sodium: 210 (mg/L)
Chloride: 400 (mg/L)
January 2024
Sodium: 190 (mg/L)
Chloride: 360 (mg/L)