The Care Group have inquired why the lake has remained closed after having readings below the red trigger closure levels for the last 2 months. Council advised that Toxin levels are also tested and are still above the recommendation for primary contact.
The concern was raised that potential users of the lake could make a false judgment based on the incomplete information in the GCCC graph and prematurely start using the lake without knowing the consequences. The Care Group have asked that the toxin levels be added to the graph and remind users not to swim in the lake while closure signs are present.
Graph Courtesy of GCCC.
The Care group prepared an open letter to Councillor Young outlining what we would like to see progress over the next 4 years.
Councillor Young has replied outlining Councils stance.
The Care group will be sending a detailed reply but in summary;
The Care Group objectives are made to address key issues effecting the long term health and recovery. Key issues that Council and Griffith have failed to address or even acknowledge. We also support an evidence-based approach and expect that key issues receive the appropriate scientific research that they deserve.
We have no issues with Council rejecting our suggestions provided they have better solution!
Simply doing nothing in resolving key problems is not going to resolve the Critical Condition of Lake Hugh Muntz.
Please follow links to documents below:
Care Group Open Letter to Councillor Young.
Councillor Young’s Letter of Reply.
The Care Group have requested an investigation into record algae levels after rain events in late January. The rain events coincided with significant inputs of dirty water from the canal. Unfortunately, neither Council or Griffith tested the inflow of water during the recent rains. Council however have been testing the canal water at specific high tide events and advised of high nitrogen levels (red arrow)
The graph shows the average yearly concentrations in LHM which are well above the Water Quality Objectives (dotted red line) for the Nerang Catchment including LHM.
No doubt, nutrient levels in the lake would also be elevated to a certain degree but ongoing and future works including gully baskets, Phoslock applications and catchment management improvements are all aimed at controlling and reducing nitrogen levels toward the water quality objectives of a healthy lake.
The concern is that unknown inputs from the canal including high nitrogen levels are going to reduce the effectiveness of any lake based improvements.
Clearly the unknown inputs of dirty, high nutrient and possibly polluted waters from the canal may not beneficial to the long term health of the lake. We request further investigation of lake inflows to determine the suitability of a one-way valve.