By Sarah Chen · environmental engineer · water, waste and everything that flows downhill

“After my 2018 bore ran dry during the worst drought in a century, I learned that relying on a single source is a gamble I can no longer afford.”

Look, if you're off-grid in Australia and your main water source fails, you're screwed. No excuses. Backup water isn't optional. Here's how to actually get it done.

Bore Water: Your Best Bet

Get a bore. It's the most reliable backup. Not a rainwater tank. Not a creek. A bore. Done.

How it works: Drill a hole (10-15m deep), install a pump, pipe to your tank. Water's underground, so it's always there. Even in droughts.

Costs (2023):

• Drilling: $3,500-$8,000 (depends on rock, depth)
• Pump + pipe: $1,200-$2,500
• Suppliers: Water Solutions Australia (NSW/QLD), Drillers Australia (WA/SA). Get 3 quotes. Don't pay the first one.

Practical tip: Test the water. Get a lab test ($150-$300). If it's salty or rusty, you need a filter. Don't skip this. You'll regret it.

Creek Water: Only If You're Desperate

Creek water? It's a last resort. It's dirty. It's full of giardia. It's why people get sick on the bush. Don't drink it straight.

How to use it:

• Filter first: Sawyer Mini ($65-$80). Must-have.
• Boil for 1 minute (or use chlorine tablets: Aquatabs $15 for 100 tabs).
• Store in clean containers. Never use plastic bottles that held chemicals.

Real talk: Creek water is a backup for emergencies only. If you're relying on it daily, you're doing it wrong. Get a bore.

Rainwater Exchange: Not What You Think

Don't fall for the "rainwater exchange" scam. It's not a thing. Some dodgy suppliers sell you a tank, then charge you to "exchange" water. Bullshit.

What actually works:

• Install a $1,500-$3,000 tank (2,000L+). Use it for showers, flushing, washing.
• Use a Rainwater Tank Systems (NSW) or Tanks Australia (nationwide) for quality tanks.
• Install a Pump ($400-$900) so you can use it without hand-pumping.

Key tip: Roof catchment is your main source, not backup. If it's dry for 6 months, you need a bore. Rainwater alone won't cut it in Australia.

The Bottom Line

Backup water isn't complicated. It's bore water. Or it's not. Creek water is a last resort. Rainwater exchange is a rip-off. Get a bore. Test it. Pump it. Done.

Don't wait until your tank's empty and the creek's dry. Get it sorted now. Your future self will thank you.

When to Call a Professional

While many off-grid projects are achievable as DIY, certain situations require licensed professionals:

• Electrical work beyond basic 12V DC additions — requires a licensed electrician
• Structural modifications to buildings or load-bearing elements
• Gas line installation or modification
• Solar array installations above safe voltage thresholds
• Any work that affects the structural integrity of your property

Always check local regulations and obtain necessary permits before commencing work.