Drinking Water Atlas
Ontario Drinking Water
49 municipalities with water quality readings. Provincial averages from the latest ECCC and municipal open data sync.
Cities in this province
Click a city for full parameter breakdown and provincial comparison
Barrie
pH 7.2 · 129 mg/L hardness
Explore →Belleville - Quinte West
pH 7.7 · 279 mg/L hardness
Explore →Brampton
pH 6.8999999999999995 · 181 mg/L hardness
Explore →Brantford
pH 7.3999999999999995 · 266 mg/L hardness
Explore →Brockville
pH 7 · 257 mg/L hardness
Explore →Burlington
pH 7.3 · 210 mg/L hardness
Explore →Cambridge
pH 7.3999999999999995 · 156 mg/L hardness
Explore →Centre Wellington
pH 8.2 · 229 mg/L hardness
Explore →Chatham-Kent
pH 8.2 · 229 mg/L hardness
Explore →Cobourg
pH 7.9 · 91 mg/L hardness
Explore →Collingwood
pH 6.8 · 255 mg/L hardness
Explore →Cornwall
pH 7.3 · 130 mg/L hardness
Explore →Elliot Lake
pH 7.8 · 105 mg/L hardness
Explore →Essa
pH 7.1 · 208 mg/L hardness
Explore →Guelph
pH 7.2 · 169 mg/L hardness
Explore →Hamilton
pH 7.7 · 104 mg/L hardness
Explore →Hawkesbury
pH 7.9 · 271 mg/L hardness
Explore →Ingersoll
pH 7.3999999999999995 · 271 mg/L hardness
Explore →Kawartha Lakes
pH 8.2 · 214 mg/L hardness
Explore →Kenora
pH 7.1 · 138 mg/L hardness
Explore →Kingston
pH 6.8 · 165 mg/L hardness
Explore →London
pH 7.3 · 100 mg/L hardness
Explore →Markham
pH 7.2 · 229 mg/L hardness
Explore →Midland
pH 8 · 177 mg/L hardness
Explore →Mississauga
pH 7.8 · 175 mg/L hardness
Explore →Norfolk
pH 7.3 · 115 mg/L hardness
Explore →North Bay
pH 7.3 · 90 mg/L hardness
Explore →Oakville
pH 8.2 · 99 mg/L hardness
Explore →Orillia
pH 6.8999999999999995 · 106 mg/L hardness
Explore →Oshawa
pH 7.6 · 93 mg/L hardness
Explore →Ottawa
pH 8 · 112 mg/L hardness
Explore →Owen Sound
pH 7.7 · 209 mg/L hardness
Explore →Pembroke
pH 7.1 · 133 mg/L hardness
Explore →Petawawa
pH 8.1 · 118 mg/L hardness
Explore →Peterborough
pH 8 · 252 mg/L hardness
Explore →Port Hope
pH 7.5 · 252 mg/L hardness
Explore →Sarnia
pH 8 · 162 mg/L hardness
Explore →Sault Ste. Marie
pH 7 · 207 mg/L hardness
Explore →St. Catharines
pH 8 · 182 mg/L hardness
Explore →Stratford
pH 7.3 · 235 mg/L hardness
Explore →Sudbury
pH 7.1 · 168 mg/L hardness
Explore →Thunder Bay
pH 7.5 · 277 mg/L hardness
Explore →Tillsonburg
pH 6.8999999999999995 · 81 mg/L hardness
Explore →Timmins
pH 7.1 · 133 mg/L hardness
Explore →Vaughan
pH 6.8999999999999995 · 156 mg/L hardness
Explore →Wasaga Beach
pH 8.2 · 244 mg/L hardness
Explore →Waterloo
pH 8.2 · 119 mg/L hardness
Explore →Windsor
pH 7.8 · 150 mg/L hardness
Explore →Woodstock
pH 7.3 · 155 mg/L hardness
Explore →