Blackwater
WardSouth Test Valley. About 6,767 people (mid-2024 estimate) in 55 square kilometres.
Radon Affected Area by ward
Worked out by Open Index · 2022
About 22% of people in Blackwater live in a 1 km square that the radon atlas marks as a radon Affected Area.
How Blackwater compares
Each dot is a ward. The black line marks the middle one.
Is Blackwater safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Blackwater at a rate of 35.6 per 1,000 people.
That compares with 60.7 per 1,000 people across Test Valley.
Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.
In August 2026 alone, 16 cases of crime and anti-social behaviour were recorded in Blackwater.
In the 12 months to August 2026, the most common types were violence and sexual offences (79), other crime (59) and burglary (32).
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.
Figures for the whole of Test Valley
These figures are published for the whole of Test Valley, not for each ward, so they describe all of Test Valley and not Blackwater alone. See Test Valley
Blackwater in brief
Blackwater had 6,424 usual residents at the census.
About 22% of people in Blackwater live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Blackwater, 26.9% of homes and businesses could get gigabit-capable broadband in January 2026.
In Blackwater, 1.6% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.