Keeping Tank Water Clean: Gutters, Screens and Sludge

Most tank water problems start on the roof and in the gutters. A simple routine keeps the water cleaner and the tank healthier.

1. Every few months

• Clean gutters and leaf guards.
• Check the inlet screen and first-flush diverter.
• Make sure the overflow has a mesh screen to keep out mosquitoes, frogs and vermin.

2. Every year or two

• Check the sludge at the bottom. Most tanks build up a layer over time. Have it pumped out or vacuumed by a tank cleaner when it gets thick.
• Check the lid and seals are tight so light and animals can't get in.

3. Signs of trouble

• Smell, colour or taste changes.
• Wrigglers (mosquito larvae) in the water.
• Dead animals in the gutters or tank.

If you see these, stop using it for drinking and get advice.

4. Drinking water

Ask your state health department or council about testing and treating rainwater for drinking.

5. Quick summary

• Gutters, screens and first-flush every few months.
• Sludge check every year or two.
• Smell or colour changes mean stop and check.

General information only. Check the maker's instructions, and ask your council about approvals.

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