407 records · 1986–2025

Overview

Network-wide summary of groundwater salinity across the Chtouka aquifer

Monitoring wells

94

407 samples in total

Date range covered

1986–2025

first to last sampling date

Average EC

1,821

µS/cm · median 1,050

Above FAO threshold

14.9%

wells with mean EC > 3,000 µS/cm

Well locations by salinity class

94 wells · all years · low < 700, medium 700–3,000, high > 3,000 µS/cm

Low (8)Medium (72)High (14)no data (0)
Initialising map…
Sampling yearAll years
All198620032025

Salinity trend by well

Select a well to see how its EC changes over time

Mean EC

6,961

Latest EC

2,820

Change

+2,115

Wells per salinity class

FAO irrigation water-quality guidelines (EC, µS/cm)

Low · < 700 µS/cm · no restriction8 · 9%
Medium · 700 – 3,000 µS/cm · slight to moderate72 · 77%
High · > 3,000 µS/cm · severe restriction14 · 15%
no data · EC not recorded0 · 0%

Classes follow FAO Table 1 for irrigation water: none (<700), slight to moderate (700–3,000) and severe (>3,000) degree of restriction on use. 0 of 407 sample records have no EC value and are reported as “no data”.

Highest mean EC

Top 6 wells, µS/cm

  • 1205/7813 samples6,961
  • 4209/709 samples6,085
  • 70/36301 sample5,980
  • NP105_221 sample5,411
  • 1336/692 samples5,405
  • 70/42091 sample5,200

Average EC by year

Mean electrical conductivity across all sampled wells, 1986–2025