Selwyn Water Zone Nitrate Testing NZFFA 2020

Selwyn River at Coe’s Ford

Selwyn Te Waihora Water Zone 2020 NO3-N mg/L

11/01 16/02 5/03 30/04
Rakaia Huts community well0.61 0.64
Jollies Brook 1.06 0.94 0.88 0.75
Cooper’s Lagoon 1.72 1.82 NT 1.98
Hart’s Creek 7.97 7.89 7.82 8.01
Tramway Res. Rd. (v. low) 0.66 0.69 0.66 0.57
Drain Rd (v. low) 0.31 0.35 0.22 0.32
Hanmer Drain 0.98 DRY DRY 0.23
Irwell River 0.54 DRYDRYDRY
Selwyn R. Coe’s Ford 7.04 7.51 7.50 7.71
Selwyn R. Chamberlain’s Ford. 8.08 8.65 NT 8.75
Coe’s Ford Amenities #1 tap 0.90
Power’s Road A (low) 4.57 4.30 4.42 4.54
Power’s Road B (low) 6.40 6.04 3.83 6.97
L II 3.26 3.25 3.25 3.45
Halswell River 2.36 2.31 1.94 2.72
Last day of the season 30/04/2020 LII River

Drain Road Many aquatic plants take up nitrate. Low flow

Irwell River No flowing water. Not tested

Selwyn River Higher nitrate level where the Selwyn is nearer groundwater source

Halswell River

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