How Hamilton is built
- Before 1961 34%
- 1961–1990 35%
- 1991–2000 10%
- 2001 or later 21%
Wells in Hamilton
The City of Hamilton estimates about 10,000 private wells and cisterns are in use, mainly by rural residents.
Local program: City of Hamilton Residential Well Decommissioning Grant: 100% of the cost up to $1,000 per well (max. 2 wells per property) to plug unused wells. Hamilton Public Health Services recommends bacteria testing at least three times a year. Details
How testing works in Ontario
Free bacteria testing through Public Health Ontario labs: pick up a kit at a PHO lab or your public health unit and drop it back off. Chemistry (nitrate, sodium, metals) goes to a licensed private lab for a fee. Local health units recommend testing at least three times a year: spring, summer and fall.
What to test for
- Bacteria (total coliforms and E. coli): at least once a year, and after flooding, heavy rain or work on the well.
- Nitrate, especially near farmland or septic systems.
- Metals and naturally occurring contaminants such as arsenic, uranium or manganese when a well is new and every few years after, depending on local geology.
Well water testing in Hamilton: common questions
Is well water testing free in Ontario?
Free bacteria testing through Public Health Ontario labs: pick up a kit at a PHO lab or your public health unit and drop it back off. Chemistry (nitrate, sodium, metals) goes to a licensed private lab for a fee. Local health units recommend testing at least three times a year: spring, summer and fall.
How often should I test my well?
For bacteria, at least once a year and after flooding, heavy rain or well work; many health units recommend more often. Test chemistry when the well is new and every few years after.
Are private wells common in Hamilton?
The City of Hamilton estimates about 10,000 private wells and cisterns are in use, mainly by rural residents.