Emergency Sewage Issues: What to Do in Hampshire & Surrey
By Alton Facility Services • Reviewed by Senior Pump Engineer • Updated June 2026
Sewage emergencies are stressful, unpleasant and potentially hazardous.
If wastewater is backing up, sewage is overflowing or alarms are sounding, fast action can reduce damage and contamination risk.
This guide explains what to do first and when to call a professional.
Quick Answer
Stop using water if sewage is backing up, keep people away from contaminated areas, do not attempt unsafe repairs, and contact a professional quickly.
Alarms, overflow, rising levels and system shutdowns should be treated seriously.
Sewage Backing Up Into the Property
This is urgent. Stop using toilets, sinks, baths, showers and appliances that discharge water.
Keep children and pets away from contaminated areas.
Pooling Wastewater Outside
Pooling wastewater near a tank, chamber or drainage field can indicate system failure, outlet blockage or overload.
Avoid contact and arrange inspection as soon as possible.
High-Level Alarms
A high-level alarm may indicate pump failure, blockage or rising liquid levels.
Do not ignore the alarm or simply reset it without checking the cause.
Complete System Shutdown
A failed treatment plant or control system can quickly lead to overflow or poor treatment.
Electrical faults should be checked by a competent engineer.
What Not to Do
Do not keep using water if the system is backing up. Do not enter chambers or attempt electrical repairs.
Do not use chemicals as a substitute for diagnosis if the system has failed.
Common Causes
Emergency issues can be caused by blockages, pump failure, power loss, sludge buildup, outlet restriction, overload or drainage field failure.
See common sewage system problems for related warning signs.
After the Emergency
Once the immediate issue is controlled, the system should be assessed for root cause and prevention.
Regular servicing can reduce risk; see the maintenance guide.
Get Emergency Support
Alton Facility Services provides sewage system diagnostics, repairs and support across Hampshire, Surrey and nearby areas.
Need urgent help? Contact our team or call 0808 175 5779.
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