Water Hardness and Quality in Thirsk
Supplied by Yorkshire Water · Thirsk (North Yorkshire)
Thirsk has hard water with quality that meets all UK drinking water standards.
Check a specific postcode in Thirsk
Water Quality Scorecard
Total Hardness
Guideline: 150+ mg/l is considered hard
274.7mg/l CaCO₃
UK Average: 197.72 mg/l CaCO₃Above Average
LowAverageHigh
pH Level
UK Standard: 6.5 – 9.5
7.35pH units
UK Average: 7.43 pH unitsAverage
LowAverageHigh
Free Chlorine
Guideline: below 1 mg/l
0.51mg/l
UK Average: 0.45 mg/lAbove Average
LowAverageHigh
Nitrate
UK Standard: max 50 mg/l
7.96mg/l
UK Average: 16.9 mg/lBelow Average
LowAverageHigh
Lead
UK Standard: max 10 µg/l
1.3µg/l
UK Average: 1.08 µg/lWell Above Average
LowAverageHigh
Fluoride
UK Standard: max 1.5 mg/l
0.08mg/l
UK Average: 0.19 mg/lBelow Average
LowAverageHigh
Water Hardness in Thirsk
Hardness is the most searched water quality metric. It affects limescale buildup in kettles, boilers, and pipes.
274.7mg/l CaCO₃Hard
Soft
Mod. Soft
Slightly Hard
Mod. Hard
Hard
Very Hard
Thirsk has hard water at 274.7 mg/l. You will likely experience significant limescale buildup in kettles, boilers, and on bathroom surfaces. Many residents in your area use water softeners or anti-limescale products.
Water Source Information
- Water Company
- Yorkshire Water
- Supply Zone
- Thirsk (North Yorkshire)
- Source Type
- Groundwater
- Treatment Works
- North Yorkshire Treatment Works
- Last Tested
- 2025-12-31
- Data Source
- Yorkshire Water
Frequently Asked Questions
Is the water hard in Thirsk?▾
Yes, Thirsk has hard water at 274.7 mg/l CaCO₃. This is classified as "Hard" on the standard scale. You may notice limescale buildup in kettles and on taps.
Is Thirsk tap water safe to drink?▾
Yes, tap water in Thirsk is safe to drink. It is treated and tested by Yorkshire Water and meets all UK Drinking Water Inspectorate standards. All tested parameters are within regulatory limits.
What is the water hardness in Thirsk?▾
The water hardness in Thirsk is 274.7 mg/l CaCO₃, which is classified as "Hard". This is above the UK national average of 170 mg/l.
Who supplies water to Thirsk?▾
Water in Thirsk is supplied by Yorkshire Water, which serves the Yorkshire and the Humber region. The water comes from underground aquifers and is treated at North Yorkshire Treatment Works.