Skip to content
 
EstuaryWatch Data Portal
Volunteer Login
  1. Find My WaterWay
  2. Estuaries
  3. Barwon River Estuary
  4. B1 The Heads
  5. Observations

B1 The Heads

Active Physico-Chemical 09-11-2007 - 06-08-2026

Barwon River Estuary

272 results found (Displaying 1 - 25)
Date Status Details
6 Aug 2026 Pending
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.5 11.90 34.70 10.47 95.5 49.60
3.0m 9.0 8.0 12.00 34.30 10.36 94.8 49.00
15 Jul 2026 Pending Notes:

Hach meter struggled to stabilize for measurement of EC values.

Top strata of water higher turbidity than lower. Outgoing surface water  was meeting incoming wave and being pushed back on itself.

Lumpy surface.
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 17.0 7.8 11.40 24.80 10.96 97.2 35.50
2.5m 17.0 8.2 12.30 31.00 10.88 99.1 44.30
2 Jul 2026 Pending
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 6.5 13.40 35.60 9.86 95.0 50.80
2.5m 9.0 7.8 13.20 35.70 9.67 92.8 51.00
17 Jun 2026 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.8 14.30 30.10 10.00 96.4 43.00
1.9m 9.0 7.4 14.10 30.20 10.07 96.5 43.10
4 Jun 2026 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.8 12.10 37.70 10.65 100.3 53.80
3.0m 9.0 7.8 12.20 37.60 10.56 99.5 53.70
20 May 2026 Approved Notes:

We were surprised Willy Weather indicated low tide was at 07.15. Two hours later the  outward current was still very strong. 
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 0.0 7.5 14.40 37.30 9.80 94.5 53.30
1.7m 0.0 7.9 14.40 37.30 9.70 93.8 53.30
15 Apr 2026 Approved Notes:

channel out to sea appears wider and is shallower due to sand movement making, boating unavailable at low tide.
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.5 16.50 38.80 9.99 101.1 55.40
2.3m 9.0 7.4 16.60 38.60 9.76 98.9 55.20
8 Apr 2026 Approved Notes:

Additional depth measurements are a result of the fast moving tide draging the probe sideways. 
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.2 17.00 38.40 8.90 91.3 54.90
2.5m 9.0 8.2 17.00 38.40 8.85 90.0 54.90
18 Mar 2026 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.6 18.50 61.30 54.60 8.3 87.60
1.9m 9.0 8.4 18.50 61.80 54.60 8.4 88.30
5 Mar 2026 Approved Notes:

Seagrass floating in outgoing tide.
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.8 19.30 38.70 7.93 85.4 55.30
1.9m 9.0 8.2 19.30 38.60 7.85 84.6 55.20
18 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 7.3 18.70 38.30 7.70 82.5 54.70
2.0m 9.0 79.0 18.40 38.20 7.63 81.3 54.60
5 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 7.9 19.00 38.60 7.99 85.1 55.20
2.5m 9.0 7.7 18.90 38.60 7.89 84.0 55.20
21 Jan 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 18.00 38.00 8.34 88.2 54.30
1.9m 9.0 7.5 18.00 38.10 8.37 88.1 54.40
1 Jan 2026 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.9 17.90 38.40 9.50 99.3 54.90
2.5m 9.0 8.2 17.90 38.40 9.40 98.3 54.80
17 Dec 2025 Approved Notes:

Laqua meter calibration did not work. Error 4. We gently tried cleaning but still did not work. Indicates membrane may need replacing.  We used ph testing strips.

Many Portuguese Man o war are littering the beaches.
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.0 17.30 43.50 9.25 95.1 62.20
2.7m 9.0 8.0 17.30 37.20 9.34 96.2 53.20
4 Dec 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.7 17.00 36.50 9.45 98.0 52.10
2.5m 9.0 8.2 16.70 37.00 9.39 96.5 52.80
19 Nov 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 8.1 16.00 36.80 9.82 99.4 52.60
2.5m 9.0 8.3 16.00 36.80 9.81 99.1 52.60
6 Nov 2025 Approved Notes:

Calm and sunny
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.8 15.30 35.30 9.34 92.7 50.40
2.5m 9.0 7.7 15.30 35.30 9.30 92.3 50.50
15 Oct 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.9 14.30 37.90 10.24 98.9 54.20
2.5m 9.0 8.2 14.40 37.80 10.22 98.7 54.00
2 Oct 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.2 13.20 38.20 10.06 96.2 54.60
3.5m 9.0 7.8 13.20 38.20 9.97 95.7 54.50
4 Sep 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 6.6 13.00 37.90 11.10 104.5 54.10
3.5m 9.0 8.4 13.10 37.80 11.02 104.1 54.00
20 Aug 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.5 12.20 38.40 11.24 102.2 54.90
2.5m 9.0 7.8 12.50 38.30 11.10 101.8 54.70
7 Aug 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.9 12.30 38.10 10.95 99.8 54.40
2.5m 9.0 8.2 12.30 38.00 10.84 99.2 54.30
16 Jul 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.9 11.20 35.50 10.49 94.7 50.70
1.9m 9.0 8.2 11.20 35.40 10.44 94.2 50.60
3 Jul 2025 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 7.3 13.40 37.60 10.23 97.2 53.70
2.5m 9.0 8.0 13.40 37.50 10.15 96.2 53.60
We acknowledge and respect Victorian Traditional Owners as the original custodians of Victoria’s land and waters, their unique ability to care for Country and deep spiritual connection to it.
We honour Elders past and present whose knowledge and wisdom has ensured the continuation of culture and traditional practices.
Creative Commons CC BY All content, files, data and images provided by the EstuaryWatch Data Portal subject to a Creative Commons Attribution License Data portal by CeRDI