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Dromana Beach

 Dormana drains map

A summary of the results for all beach drains between December 2018 to March 2019 is available on the results page and for Dromana below the table. Below is a table of drain flows since the start of monitoring, updated monthly.

Drains

Type of monitoring

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Community reports between Dec 2018 - Apr 2019 Were dry weather flows detected on regular days/times?
Number of days drain flowing between Dec 2018 - Apr 2019  Number of medium - high flow reports between Dec 2018 - Apr 2019 

Pier Street drain

Image of drain at Pier Street- Dromana

Citizen science volunteers

 Community reports at drain signs

16 6  Some dry weather flows with ammonia detected. If more flows are detected EPA will sample to confirm type and extent of pollution.

Arthur Street drain 

 Image of Arthur Street Drain- Dromana

Citizen science volunteers 9 1  Some dry weather flows with ammonia detected. If more flows are detected EPA will sample to confirm type and extent of pollution.

Beach Street drain 

Image of drain at Beach Street- Dromana

Citizen science volunteers 13 0 Some dry weather flows with ammonia detected. If more flows are detected EPA will sample to confirm type and extent of pollution.

 Carrigg Street drain

Image of drain at Carrigg Street- Dromana

Citizen science volunteers 8 0 Some dry weather flows with ammonia detected. If more flows are detected EPA will sample to confirm type and extent of pollution.

 

Summary of results - December 2018 to March 2019

Dromana Beach has had a high level of reporting, with three quarters of these reports submitted by trained citizen science volunteers. Active volunteers at Dromana have all submitted more than one report, with two volunteers submitting 13 reports and 22 reports respectively! 

Flows:

  • Dromana Beach drains flow regularly, with two thirds of reports showing drains flowing, although most were small flows. The focus of this project has been to target regular medium to large sized flows, but will switch to following up on small flows as no regular medium or large flows are being detected.
  • Just under 40% of small flows occurred when there has not been recent rainfall. If more flows not related to rainfall are detected, EPA sampling will occur so we confirm the type and extent of pollution from these sized flows.
  • Large flows not related to rainfall have been detected, but were not regular.

Ammonia levels:

  • When our trained citizen scientists observe a drain flowing, they perform a simple test for ammonia. Ammonia can be used as a proxy for faecal pollution, as animals excrete ammonia in waste, but it can also indicate other pollution such as detergents or fertilizer. Concentration of ammonia can also vary depending on size of flow and dilution in the drain system.
  • Ammonia results at Dromana are varied, ranging from 0 to 1 mg/L (higher levels during rain), with ammonia detected in half of dry weather flows and at low levels (e.g. 0.25 mg/L). Follow-up sampling will confirm if microbial levels are low at these ammonia concentrations (i.e. do low ammonia levels mean low microbial levels in drain flows).

All this data helps EPA gather a better understanding of stormwater flows affecting Dromana Beach. Reports will be collected until the end of May 2019 and begin again in late 2019.

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