Water & drainage services in Portsmouth
Every water and drainage job WaterTrust covers in Portsmouth, Hampshire — post free, get up to 4 quotes from vetted contractors. Water is supplied here by Portsmouth Water, with sewers run by Southern Water; postcode districts PO3, PO2, PO6, PO1, PO4, PO5, PO12, PO7, PO16, PO11, PO9, PO13.
WaterTrust Approved — every contractor is identity-checked with accreditation and insurance verified before they can quote.
Local water facts for Portsmouth
Water supply: Portsmouth Water · www.portsmouthwater.co.uk · 023 9249 9888
Wastewater & sewers: Southern Water
Postcode districts covered: PO3, PO2, PO6, PO1, PO4, PO5, PO12, PO7, PO16, PO11, PO9, PO13
Water hardness: Hard (High limescale risk). Hardness mainly affects supply pipework and appliances rather than buried drains. The exception is internal waste pipes: urinals, WCs and sink wastes in hard-water areas do scale up, which is what descaling addresses.
Most properties in Portsmouth are supplied by Portsmouth Water, although this can vary by postcode. Wastewater is typically handled by Southern Water. Water hardness in Portsmouth is typically Hard (High limescale risk). Common local postcode districts include PO3, PO2, PO6 and nearby districts.
Who fixes what in Portsmouth: since the 2011 private sewer transfer, shared sewers and the lateral drain beyond your property boundary are normally Southern Water's responsibility, while drains serving only your property inside the boundary are the owner's. Contractors on WaterTrust quote for the private side; if the defect sits on Southern Water's side, they will tell you rather than charge you for it.
Hire a contractor in Portsmouth
Water supply
- Impact Moling
- Lead Pipe Replacement
- Water Leak Detection
- Water Main Installations
- Water Main Renewals
- Water Main Repairs
- Water Supply Pipe Installations
- Water Supply Pipe Renewals
- Water Supply Pipe Repairs
Drainage & wastewater
- CCTV drain surveys
- Commercial drain cleaning
- Commercial drain installation
- Commercial drain repairs
- Commercial drains
- Deep rooted drain unblocking
- Drain Lining
- Drain Mapping
- Drain Repairs
- Drain cleaning
- Drain cleaning and jetting
- Drain installation
- Drain installation and trenchless repairs
- Drain unblocking
- Emergency drain services
Advice & cost guides for Portsmouth
Water supply
- Impact Moling Prices 2026
- Lead Pipe
- Lead Pipe Replacement Scheme
- Low Water Pressure
- Replacing Lead Pipes
- Water Filter
- Water Leaks
Drainage & wastewater
- Blocked Drains
- Blocked Outside Drains
- Blocked Sewer Drains
- CCTV Drain Survey Cost
- CCTV Drain Surveys — advice
- Collapsed Drain Repairs
- Commercial Drain Cleaning — advice
- Commercial Drain Installation — advice
- Commercial Drain Repairs — advice
- Commercial Drains — advice
- Cracked Drain Repairs
- Deep Rooted Drain Unblocking — advice
- Drain Cleaning — advice
- Drain Cleaning and Jetting — advice
- Drain Installation — advice
- Drain Installation and Trenchless Repairs — advice
- Drain Jetting
- Drain Lining — advice
- Drain Maintenance
- Drain Mapping — advice
- Drain Repair Costs
- Drain Repairs — advice
- Drain Smells
- Drain Unblocking — advice
- Emergency Drain Services — advice
- Emergency Drain Unblocking
- No-Dig Drain Repairs
- Root Damage in Drains
- Slow Draining Sinks and Toilets
- Trenchless Drain Repairs