Mannering Park, Lake Macquarie, fish kills
Information about fish kills at Mannering Park, Lake Macquarie, and the ongoing investigation.
Smart buoy tracking water quality
A smart buoy that uses advanced technology to help track water quality has been deployed near Wyee Point following fish kills in August and September. The data will contribute to the long-term understanding of water quality in the lake.
The custom-built buoy – which looks like a traditional navigation buoy – uses pumps to automatically sample water from different depths, passing through an array of water quality sensors, and then transmitting the data to the cloud for real-time analysis.
Over the next six months, the buoy will provide vital baseline data, which will assess salinity, turbidity, oxygen, temperature and pH levels.
September event
A second fish kill occurred at Mannering Park in September. Delta Electricity, licensee of the Vales Point Power Station provided new information relating to this fish kill.
We inspected the Vales Point Power Station facility and secured equipment on-site as part of our investigation. Testing was also undertaken, and we are conducting further enquires.
We have requested a further report from the licensee and this information will form part of the EPA’s ongoing investigation.
August event
Investigations of the August fish kill at Mannering Park, show it was likely a natural event.
EPA officers, Central Coast Council and NSW Fisheries attended the site and collected fish and water samples for laboratory analysis. Through extensive water sampling, toxicity testing and analysis there are no significant findings of pesticides, metals or toxicity.
The NSW Department of Planning and Environment labs tested for a full suite of metals and pesticides and found levels below the Australian and New Zealand Environment Conservation Council (ANZECC) marine water quality guidelines (where guideline limits are specified). Levels of pH and electrical conductivity were within normal ranges for a saline lake.
The sampling results for Total nitrogen and Total phosphorus were above the guideline values, which may indicate that disruption of sediment has occurred.
These results, along with analysis of weather conditions at the time, indicate the most likely cause of the deaths was from a combination of factors.
The bay at Mannering Park has elevated temperatures compared to the rest of Lake Macquarie due to the cooling water discharges from Vales Point power station.
A range of fish, including tropical fish, are attracted to the bay due to these higher temperatures.
The fish kill was preceded by cool nights in the first week of August and a shift to northerly winds, with the strongest winds on August 4.
This may have caused cold lake water to enter the bay and resulted in a turnover of the water column.
If this was rapid enough it would have caused a disturbance of the sediments, which explains the high ammonium concentrations observed on August 5, and potentially the release of sulfides.
Our results suggest the combination of the temperature and sulfide stress likely overwhelmed fish, acclimatized to higher temperatures.
We know the important role Lake Macquarie and the bay plays in the community and the region’s wider environment and have deployed a ‘smart buoy’ at Wyee Point to allow ongoing monitoring in the coastal lake.
The EPA has worked closely with the Department of Planning and Environment – Science, Biosecurity, Food and Fisheries and Central Coast Council on the investigation that produced these findings. The dead fish have also been removed by Council.
Sampling map
Fish autopsy results received 30/08/2022
| Pesticides | Units | GI Tract – Fish 3 | Gills – Fish 3 | Liver – Fish 3 | Gills – Fish 1 | GI Tract – Eagle Ray | Gills – Eagle Ray | Liver – Eagle Ray |
|---|---|---|---|---|---|---|---|---|
|
Aldrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Allethrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Alpha-Chlordane |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
alpha-HCH |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Ametryn |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Atraton |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Atrazine |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
beta-HCH |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Bifenthrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Bioresmethrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Carbophenothion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Chlorpyrifos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Cis-permethrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Crotoxyphos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Cyfluthrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Cypermethrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
DDD-p,p' |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
DDE-p,p' |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
DDT-p,p' |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
delta-HCH |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Deltamethrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Diazinon |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Dichlorvos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Dieldrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
71 |
|
Dimethoate |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Endosulfan II |
µg/kg |
<100 |
<380 |
<350 |
<570 |
<100 |
<100 |
<100 |
|
Endosulfan I |
µg/kg |
<100 |
<380 |
<350 |
<570 |
<100 |
<100 |
<100 |
|
Endosulfan Sulfate |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<100 |
<100 |
<100 |
|
Endrin Ketone |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Endrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Enthion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Fenamiphos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Fenitrothion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Fenthion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Fenvalerate |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Gamma-Chlordane |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
gamma-HCH |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Heptachlor Epoxide |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Heptachlor |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Hexachlorobenzene |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Hexazinone |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
L-cyhalothrin |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Malathion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Methidathion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Methoxychlor,p,p' |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Methyl Chlorpyrifos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Methyl Parathion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Mevinphos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Oxyfluorfen |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Parathion |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Phorate |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Profenofos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Prometon |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Prometryn |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Propargite |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Propazine |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Propetamphos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Simazine |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Simetryn |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Tebuconazole |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Terbuthylazine |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Terbutryn |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Tetrachlorvinphos |
µg/kg |
<50 |
<190 |
<180 |
<290 |
<50 |
<50 |
<50 |
|
Trans-permethrin |
µg/kg |
<100 |
<380 |
<350 |
<570 |
<100 |
<100 |
<100 |
|
Metals* and Inorganics |
||||||||
|
Aluminium |
mg/kg |
72 |
33 |
33 |
510 |
26 |
5 |
<4 |
|
Antimony |
mg/kg |
<2 |
<2 |
<5 |
<3 |
<2 |
<2 |
<2 |
|
Arsenic |
mg/kg |
<3 |
<3 |
<7 |
<5 |
<3 |
<3 |
11 |
|
Barium |
mg/kg |
<1 |
3 |
<2 |
9 |
<1 |
<1 |
<1 |
|
Beryllium |
mg/kg |
<1 |
<1 |
<2 |
<2 |
<1 |
<1 |
<1 |
|
Boron |
mg/kg |
<10 |
<10 |
<23 |
<15 |
<10 |
<10 |
<10 |
|
Cadmium |
mg/kg |
<1 |
<1 |
5 |
<2 |
1 |
<1 |
2 |
|
Calcium |
mg/kg |
230 |
26000 |
150 |
47000 |
1400 |
200 |
34 |
|
Chromium |
mg/kg |
<1 |
<1 |
<2 |
<2 |
<1 |
<1 |
<1 |
|
Cobalt |
mg/kg |
<1 |
<1 |
<2 |
<2 |
<1 |
<1 |
<1 |
|
Copper |
mg/kg |
10 |
<3 |
140 |
<5 |
<3 |
<3 |
<3 |
|
Iron |
mg/kg |
330 |
100 |
740 |
710 |
92 |
57 |
130 |
|
Lead |
mg/kg |
<2 |
4 |
<5 |
<3 |
<2 |
<2 |
<2 |
|
Lithium |
mg/kg |
<1 |
<1 |
<2 |
<2 |
<1 |
<1 |
<1 |
|
Magnesium |
mg/kg |
320 |
770 |
260 |
1700 |
300 |
230 |
59 |
|
Manganese |
mg/kg |
11 |
18 |
<5 |
33 |
8 |
<2 |
<2 |
|
Mercury |
µg/kg |
N/A |
N/A |
N/A |
N/A |
11 |
31 |
15 |
|
Molybdenum |
mg/kg |
<1 |
<1 |
<2 |
<2 |
<1 |
<1 |
<1 |
|
Nickel |
mg/kg |
<2 |
<2 |
<5 |
<3 |
<2 |
<2 |
<2 |
|
Phosphorus |
mg/kg |
2800 |
14000 |
3600 |
23000 |
2000 |
1800 |
1000 |
|
Potassium |
mg/kg |
3100 |
1600 |
3700 |
510 |
1400 |
2100 |
1100 |
|
Selenium |
mg/kg |
<4 |
<4 |
14 |
<6 |
<4 |
<4 |
<4 |
|
Silicon |
mg/kg |
75 |
28 |
<14 |
310 |
25 |
<6 |
<6 |
|
Silver |
mg/kg |
<0.6 |
<0.6 |
<1.4 |
<0.9 |
<0.6 |
<0.6 |
<0.6 |
|
Sodium |
mg/kg |
1500 |
3900 |
1700 |
5200 |
3100 |
3800 |
660 |
|
Strontium |
mg/kg |
<3 |
180 |
<7 |
310 |
7 |
<3 |
<3 |
|
Sulfur |
mg/kg |
2800 |
1700 |
3500 |
1700 |
2300 |
2000 |
1000 |
|
Thallium |
mg/kg |
<2 |
<2 |
<5 |
<3 |
<2 |
<2 |
<2 |
|
Tin |
mg/kg |
<2 |
<2 |
<5 |
<3 |
<2 |
<2 |
<2 |
|
Titanium |
mg/kg |
<1 |
<1 |
<2 |
11 |
<1 |
<1 |
<1 |
|
Vanadium |
mg/kg |
<1 |
1 |
3 |
2 |
<1 |
<1 |
<1 |
|
Zinc |
mg/kg |
36 |
31 |
83 |
50 |
16 |
12 |
9 |
|
|
||||||||
|
*For guidance on safe metal limits for human consumption in fish including mercury see NSW Department of Primary Industries advice |
||||||||
Pesticides results received 22/08/2022
| Pesticides | Units | ANZECC marine WQG (95% species protection) |
Kevin St |
Vales Pt |
Wyee Marina |
Vales Pt Discharge Point 22 |
|---|---|---|---|---|---|---|
| Aldrin | µg/L | No guideline value |
<0.3 | <0.3 | <0.3 | <0.3 |
| Allethrin | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Alpha-Chlordane | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| alpha-HCH | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Ametryn | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Atraton | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Atrazine | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| beta-HCH | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Bifenthrin | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Bioresmethrin | µg/L | No guideline value |
<0.3 | <0.3 | <0.3 | <0.3 |
| Carbophenothion | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Chlorpyrifos | µg/L | 0.009 | <0.4 | <0.4 | <0.4 | <0.4 |
| Cis-permethrin | µg/L | No guideline value |
<0.3 | <0.3 | <0.3 | <0.3 |
| Crotoxyphos | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Cyfluthrin | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Cypermethrin | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| DDD-p,p' | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| DDE-p,p' | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| DDT-p,p' | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| delta-HCH | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Deltamethrin | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Diazinon | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Dichlorvos | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Dieldrin | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Dimethoate | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Endosulfan II | µg/L | No guideline value |
<1.0 | <1.0 | <1.0 | <1.0 |
| Endosulfan I | µg/L | 0.01 | <0.9 | <0.9 | <0.9 | <0.9 |
| Endosulfan Sulfate | µg/L | No guideline value |
<1.0 | <1.0 | <1.0 | <1.0 |
| Endrin Aldehyde | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Endrin Ketone | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Endrin | µg/L | 0.008 | <0.5 | <0.5 | <0.5 | <0.5 |
| Ethion | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Fenamiphos | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Fenitrothion | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Fenthion | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Fenvalerate | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Gamma-Chlordane | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| gamma-HCH | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Heptachlor Epoxide | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Heptachlor | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Hexachlorobenzene | µg/L | No guideline value |
<0.3 | <0.3 | <0.3 | <0.3 |
| Hexazinone | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| L-cyhalothrin | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Malathion | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Methidathion | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Methoxychlor,p,p' | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Methyl Azinphos | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Methyl Chlorpyrifos | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Methyl Parathion | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Mevinphos | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Oxyfluorfen | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Parathion | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Phorate | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Profenofos | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Prometon | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Prometryn | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Propargite | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Propazine | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Propetamphos | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Simazine | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Simetryn | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Sulprofos | µg/L | No guideline value |
<0.4 | <0.4 | <0.4 | <0.4 |
| Tebuconazole | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Tebuthiuron | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Terbuthylazine | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Terbutryn | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Tetrachlorvinphos | µg/L | No guideline value |
<0.5 | <0.5 | <0.5 | <0.5 |
| Trans-permethrin | µg/L | No guideline value |
<0.7 | <0.7 | <0.7 | <0.7 |
Ecotoxicology results received 22/08/2022
| Bacterial luminescence inhibition (V.fisheri) |
Light emitted at 15-min |
Light emitted at 30-min |
Result |
|---|---|---|---|
| Kevin St | >80% | >80% | Not toxic |
| Vales Pt | >80% | >80% | Not toxic |
| Wyee Marine | >80% | >80% | Not toxic |
| Vales Pt Discharge Point 22 | >80% | >80% | Not toxic |
* Fish results to come
Nutrients testing results received 19/08/2022
| Organics | Units | 2018 ANZECC marine WQG (95% species protection) | Kevin St | Vales Pt | Wyee Marina | Vales Pt Discharge Point 22 |
|---|---|---|---|---|---|---|
| Total Nitrogen as N | mg/L | 0.3 | 0.6 | 0.6 | 0.7 | 0.6 |
| Ammonia as N | mg/L | – | 0.11 | 0.07 | 0.06 | 0.07 |
| Nitrite + Nitrate as N | mg/L | – | 0.02 | 0.01 | <0.01 | 0.01 |
| Total Kjeldahl Nitrogen as N | mg/L | – | 0.6 | 0.6 | 0.7 | 0.6 |
| Reactive Phosphorus as P | mg/L | – |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
| Total Phosphorus as P | mg/L | 0.03 | 0.06 | 0.08 | 0.05 | 0.08 |
| Biochemical Oxygen Demand | mg/L | – | 2 | 4 | 2 | 4 |
Direct toxicity test results received 19/08/2022
| 72-h amphipod Mellita immobilisation test | Immobilisation at 72 hours (%) | Result |
|---|---|---|
| Kevin St | 0 | Not toxic |
| Vales Pt | 0 | Not toxic |
| Wyee Marina | 0 | Not toxic |
| Vales Pt Discharge Point 22 | 0 | Not toxic |
*Pesticides and fish results to come.
pH and conductivity data
| Sample Location | Kevin St | Vales Pt | Vales Pt Discharge Point 22 | Wyee Marina | |
|---|---|---|---|---|---|
|
pH |
pH unit |
8.1 |
8.1 |
8 |
8.1 |
|
Conductivity |
µS/cm |
44000 |
43000 |
44000 |
43000 |
Water sample metals data
| Dissolved metals | 2018 ANZECC marine WQG (95% species protection) | Kevin St | Vales Pt | Vales Pt Discharge Point 22 | Wyee Marina | |
|---|---|---|---|---|---|---|
|
Aluminium |
mg/L |
No guideline value |
<0.04 |
<0.04 |
<0.04 |
<0.04 |
|
Boron |
mg/L |
No guideline value |
3.6 |
3.7 |
3.7 |
3.7 |
|
Calcium |
mg/L |
No guideline value |
300 |
300 |
300 |
300 |
| Chromium | mg/L | 0.027 | <0.001 | <0.001 | <0.001 | <0.001 |
|
Iron |
mg/L |
No guideline value |
<0.1 |
<0.1 |
<0.1 |
<0.1 |
|
Lithium |
mg/L |
No guideline value |
0.19 |
0.15 |
0.16 |
0.15 |
|
Magnesium |
mg/L |
No guideline value |
1000 |
1000 |
1000 |
1000 |
|
Potassium |
mg/L |
No guideline value |
320 |
330 |
320 |
320 |
|
Sodium |
mg/L |
No guideline value |
8100 |
8200 |
8000 |
8000 |
|
Strontium |
mg/L |
No guideline value |
6.1 |
6.2 |
6.2 |
6.1 |
|
Sulfur |
mg/L |
No guideline value |
680 |
680 |
660 |
660 |
|
Titanium |
mg/L |
No guideline value |
<0.01 |
<0.01 |
<0.01 |
<0.01 |
|
Antimony |
mg/L |
No guideline value |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
|
Arsenic |
mg/L |
No guideline value |
<0.003 |
<0.003 |
<0.003 |
<0.003 |
|
Barium |
mg/L |
No guideline value |
0.0097 |
0.0095 |
0.0094 |
0.01 |
|
Beryllium |
mg/L |
No guideline value |
<0.0002 |
<0.0002 |
<0.0002 |
<0.0002 |
|
Cadmium |
mg/L |
0.0055 |
<0.0003 |
<0.0003 |
<0.0003 |
<0.0003 |
|
Cobalt |
mg/L |
0.001 |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
|
Copper |
mg/L |
0.0013 |
<0.002 |
<0.002 |
<0.002 |
<0.002 |
|
Lead |
mg/L |
0.0044 |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
|
Manganese |
mg/L |
No guideline value |
<0.003 |
<0.003 |
<0.003 |
<0.003 |
|
Molybdenum |
mg/L |
No guideline value |
0.011 |
0.011 |
0.011 |
0.011 |
|
Nickel |
mg/L |
0.07 |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
|
Selenium |
mg/L |
No guideline value |
<0.005 |
<0.005 |
<0.005 |
<0.005 |
|
Silver |
mg/L |
0.0014 |
<0.0001 |
<0.0001 |
<0.0001 |
<0.0001 |
|
Thallium |
mg/L |
No guideline value |
<0.0005 |
<0.0005 |
<0.0005 |
<0.0005 |
|
Tin |
mg/L |
No guideline value |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
|
Vanadium |
mg/L |
0.1 |
0.0025 |
0.0025 |
0.0022 |
0.0021 |
|
Zinc |
mg/L |
0.008 |
<0.005 |
<0.005 |
<0.005 |
<0.005 |
