Annual report
A year of fewer leaks and thinner reserves
What the Water Committee did with the town's water in 2025–26, and three things it asks the council to decide.
Headline
We lost far less of the water we treated
18%
Share of treated water lost before it reached a tap, down from 26% the year before. It is the lowest figure since the town began measuring it.
Source: Ollerby Water Services, Annual Return 2025–26, table 3
Leakage, four years
Most of the drop came after the Mill Lane main was replaced
Source: Ollerby Water Services, Annual Returns 2022–23 to 2025–26, table 3
What came out of the tap
Water quality held, with one boil notice
99.7%
Of samples passed every test
Source: Ollerby Lab Log 2025–26, summary sheet
1
Boil notice, lasting two days in the Quarry district
Source: Council Incident Register, entry 14
41
Minutes, the average time without supply per household
Source: Water Services Outage Log 2025–26
The worry
The reservoir fell further than it has in a decade
38%
Lowest level of Hallow Reservoir, reached in the second week of August. The council's drought plan begins restrictions at 35%.
Source: Hallow Reservoir Level Record, August 2025; Ollerby Drought Plan, section 2
Where the money went
Pipe renewal took the largest share of the budget
Source: Ollerby Town Council, Water Account 2025–26, note 7
What did not go well
Three things we would do differently
The Quarry valve
The damage was avoidable. Contractors now get updated valve maps before any digging.
Late warnings
Residents heard about the August low too late to change much. Levels now go online weekly.
Slow meter rollout
We fitted far fewer meters than promised, because of a supplier delay.
What we ask of the council
Three decisions for the next meeting
Fund the next main
Approve £1.8m to replace the Church Row main in 2026–27.
Lower the trigger?
Decide whether restrictions should begin at 40% rather than 35%.
Publish levels
Make the weekly reservoir update a standing duty of the committee.
Source: Water Committee, Proposals to Council, items 1 to 3