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H1 Site one (Hopkins River Bridge)

Active Physico-Chemical 01-01-2000 - 19-04-2026

Hopkins River Estuary

185 results found (Displaying 1 - 25)
Date Status Details
19 Apr 2026 Approved

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.3 14.50 11.40 9.00 99.0 19.16
3.5m 9.0 7.8 16.00 23.40 3.20 30.6 37.21
20 Mar 2026 Approved Notes:

Suspect the pH was no accurate, could not calibrate as there was no calibration samples (0.4, 0.7 etc). Sampled rainwater as a control sample after EW sampling and it was also high (8.9).

No worries, thanks for the notification.  I can grab the unit off you & investigate/fix/replace.  Thanks Jarred.

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 9.1 20.80 14.90 8.50 102.8 24.54
4.2m 9.0 9.2 19.70 15.40 5.14 60.5 25.18
20 Feb 2026 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.0 23.30 17.70 8.55 111.1 28.65
3.8m 9.0 7.9 20.50 18.10 3.73 46.1 29.22
16 Jan 2026 Approved Notes:

very windy 

rotten egg gas found at bottom

assisted by Gilly and Fiona
img20260117_11503963.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.8 21.80 18.80 7.45 94.7 30.22
3.2m 9.0 7.0 21.50 19.10 0.00 0.0 30.51
19 Dec 2025 Approved
img20251220_17541151.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 8.3 25.00 15.70 8.05 107.0 25.84
3.5m 10.0 8.1 17.80 32.50 3.84 48.6 49.70
21 Nov 2025 Approved Notes:

Assisted by Fiona

Very strong southerly wind
img20251122_15005380.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 18.0 8.4 19.10 3.70 10.78 118.5 5.73
3.2m 18.0 8.0 15.90 27.80 6.09 72.1 43.15
17 Oct 2025 Approved Notes:

DO supersaturated at the top and nearly anoxic at the bottom! Very dramatic oxycline.
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 12.0 8.1 19.20 9.90 10.98 125.8 16.83
3.5m 12.0 7.7 14.70 27.90 0.98 11.4 43.24
19 Sep 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 11.0 7.9 16.20 17.60 10.84 124.0 28.45
3.8m 11.0 7.8 14.30 31.70 6.53 78.3 48.62
15 Aug 2025 Approved Notes:

Very windy
img20250815_20511580.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.6 13.40 20.90 8.91 99.0 38.62
3.5m 9.0 7.8 13.60 32.20 8.07 94.6 49.25
11 Jul 2025 Approved Notes:

Assisted by Fiona
img20250711_17575396.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.0 11.50 20.00 9.70 100.4 32.05
4.2m 9.0 7.9 13.10 30.80 6.51 74.7 47.43
13 Jun 2025 Approved Notes:

very calm

mouth artificially opened 3 days ago

significant rainfall over previous weekend
img20250613_12355160.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 8.1 9.50 0.10 10.68 92.1 0.10
3.4m 10.0 7.4 13.40 24.90 2.00 22.0 39.15
17 May 2025 Approved Notes:

Assisted by Fiona.

Very windy.
img20250517_16490063.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.0 14.20 8.80 9.20 93.7 15.00
4.5m 9.0 7.8 14.80 10.90 3.87 39.7 18.19
12 Apr 2025 Approved
img20250413_10044785.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.0 18.30 9.30 8.98 99.7 15.89
4.0m 9.0 7.8 17.00 23.20 4.20 49.3 36.65
21 Mar 2025 Approved
img20250323_12153369.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.2 20.50 9.20 7.38 84.4 15.76
4.5m 9.0 8.0 19.90 9.20 6.15 71.0 15.75
21 Feb 2025 Approved Notes:

No standard KCl, so couldn't calibrate EC. Strong southerly wind
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.2 20.90 9.30 8.35 98.6 15.83
4.5m 9.0 8.1 19.00 9.70 7.05 80.3 16.55
17 Jan 2025 Approved Notes:

Assisted by Fiona.

Strong SE wind
img20250117_19382888.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.0 23.40 10.00 8.03 99.1 17.00
4.3m 9.0 7.7 23.20 10.00 7.48 91.7 17.04
13 Dec 2024 Approved Notes:

Assisted by Fiona and Michelle

Thanks for the hard work, I hope you all have a wonderful Christmas and New Years! - Phoebe
img20241214_16190531.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.1 21.80 12.70 8.00 98.3 21.21
3.5m 9.0 7.7 20.20 22.80 0.36 4.8 36.21
15 Nov 2024 Approved Notes:

Assisted by Fiona

 

Very windy, southerly
img20241116_12213833.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.1 20.10 9.90 8.57 99.8 16.81
4.0m 9.0 7.8 18.10 23.70 0.97 11.7 37.28
21 Oct 2024 Approved Notes:

Assisted by Neil
img20241022_12270578.pdf
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.6 19.90 8.90 9.51 109.5 15.06
3.7m 9.0 8.2 16.30 27.70 6.45 75.3 43.19
21 Sep 2024 Approved Notes:

Assisted by Emily, Harriet and Teddy

River mouth just open, with large swell

 

Awesome work everyone. Great news to hear that the mouth is surviving the ongoing swells, let's hope it stays that way. Cheers, Phoebe Edwards

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.8 13.60 15.80 9.40 100.3 25.90
4.0m 9.0 7.9 13.40 26.70 7.81 88.4 41.71
17 Aug 2024 Approved Notes:

Assisted by Fiona

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.3 14.70 11.60 10.82 115.1 19.34
3.9m 9.0 8.0 14.00 29.10 5.52 63.3 45.04
21 Jul 2024 Approved Notes:

Assisted by Fiona

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.2 11.90 12.20 9.64 96.1 20.41
3.8m 9.0 7.9 12.60 30.20 8.47 95.9 46.56
22 Jun 2024 Approved Notes:

Fiona Spruzen, Tim and Harriot also helped sample
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.4 11.20 7.30 11.09 104.1 12.75
3.5m 9.0 8.0 12.90 26.80 6.62 72.7 41.79
25 May 2024 Approved Notes:

Artificial opening of mouth previous day.

Water movement ++

Assisted by Jarred

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.3 12.80 8.00 10.63 104.1 13.70
3.8m 9.0 7.7 15.20 26.50 1.85 20.7 41.12
20 Apr 2024 Approved Notes:

Also on the team Fiona Spruzen and Emily Horwill for this sampling trip

pH meter couldn't be calibrated so we used pH test strips
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.5 16.20 13.80 9.38 102.1 22.78
3.5m 9.0 7.5 16.30 17.30 5.87 65.1 28.04
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