Tapwater quality in Llandudno and Colwyn
Study your local water and see how it differs across the UK by clicking the pins on this interactive map of UK water quality data. The data in this map comes from water authority Drinking Water Analyses, which are freely available.« Back to map
Water quality data for Llandudno and Colwyn
| Authority | Welsh Water |
| Zone | Llandudno and Colwyn |
| County | Conwy |
| pH | pH 7.5687 on average |
| Ammonium | 0.0277 mg/l on average |
| Nitrite | 0.0023 mg/l on average |
| Nitrate | 0.4464 mg/l on average |
| Calcium carbonate | 35.8 mg/l |
| Hardness | 2 °GH |
| GH | 2 °GH |
| Free chlorine | 0.3003 mg/l |
| Total chlorine | 0.3766 mg/l |
| Chloramine | 0.08 mg/l |
| Contributor | Matt Clarke |
