Best Septic Tank Emptying in Dorset (2026)
Comparing 12 EA-registered companies in Dorset, South West.
Looking for the best septic tank emptying company in Dorset? We've listed all 12 EA-registered waste carriers in the area so you can compare them side by side. Every company holds a valid Upper Tier registration verified against the official Environment Agency waste carrier register.
Under the General Binding Rules, your septic tank must be emptied by a registered waste carrier. Using an unregistered operator is a criminal offence that can result in unlimited fines. All 12 companies listed below are legally authorised to collect and transport liquid waste in Dorset.
Compare Septic Tank Companies in Dorset
| # | Company | EA Reg | Rating | Phone |
|---|---|---|---|---|
| 1 | DRAIN DEFENCE LTD | ✅ | - | +44 800 001 6568 |
| 2 | Lee Coughlan trading as Charminster Drains and Building | ✅ | - | +44 1202 028818 |
| 3 | MAINTAIN UK DRAINS LIMITED | ✅ | - | +44 1202 300040 |
| 4 | Darren Green trading as Dorset Property Drainage Solutions | ✅ | - | +44 1202 922911 |
| 5 | DORSET DRAINAGE SERVICES (UK) LTD | ✅ | - | +44 1258 841208 |
| 6 | DRAINAGE & TANKER SERVICES LTD | ✅ | - | +44 1258 841208 |
| 7 | ENVIRONMENTAL DRAIN SERVICES LIMITED | ✅ | - | +44 1202 821340 |
| 8 | THE DRAIN TEAM (DORSET) LIMITED | ✅ | - | +44 1258 841208 |
| 9 | YOUR DRAINAGE SOLUTIONS LIMITED | ✅ | - | +44 800 088 6506 |
| 10 | PRO DRAINAGE LIMITED | ✅ | - | +44 800 611 8277 |
| 11 | CANFORD DRAINS LTD | ✅ | - | +44 1202 880202 |
| 12 | DATUM DRAINAGE LIMITED trading as Datum Drainage Ltd | ✅ | - | +44 845 009 3078 |
How to Choose a Septic Tank Company in Dorset
With 12 registered companies to choose from in Dorset, here are the key things to check before booking:
- EA Registration: Confirm the company holds a current Upper Tier waste carrier registration. All companies listed above are verified, but you can also check the EA public register directly.
- Tank access: Ask about access requirements. Some companies need a clear route for the tanker within 30 metres of your tank. Mention any narrow lanes, gates, or soft ground.
- Tank size: Know your tank capacity (most domestic tanks are 2,700-4,500 litres). Larger tanks cost more to empty. If you're unsure, the company can assess on arrival.
- Disposal certificate: A reputable company will provide a waste transfer note after every emptying. Keep these as proof of compliance—you may need them when selling your property.
- Regular schedule: Many companies offer annual contracts at a discount. The Environment Agency recommends emptying at least once a year for most households.
What Does Septic Tank Emptying Cost in Dorset?
Typical septic tank emptying costs in Dorset range from £150 to £300 for a standard domestic tank (up to 4,500 litres). Larger tanks (9,000L+) cost £300-£450. Emergency or out-of-hours callouts may carry a premium of 50-100%. Cesspit emptying is more expensive due to higher volumes—expect £150-£400 per visit depending on capacity.
Prices vary between companies, so it's worth getting 2-3 quotes. Distance from the disposal site, ease of access, and tank condition all affect the final price.
When to Book an Emptying
Most septic tanks in Dorset should be emptied every 12-18 months, though households of five or more may need it annually. Cesspits require much more frequent emptying—typically every 4-6 weeks. Book early in autumn before the winter rush, when demand spikes due to wetter ground and higher indoor water usage.
Warning signs your tank is overdue: slow-draining sinks or toilets, foul odours near the tank or drainage field, soggy ground around the soakaway, or gurgling pipes. If you notice sewage surfacing, call one of the companies above immediately.