Requires backflow-prevention devices on water services to protect Hamilton's municipal drinking-water system from contamination; sets testing/inspection and compliance requirements.
Water & sewer — Hamilton, Ontario
What are the water and sewer rules and rates?
In the City of Hamilton, Ontario, water & sewer rules are set by Backflow Prevention By-law No. 10-103 (Consolidation) and 4 other bylaws, verified 2026-10-18. Sewer rate: Residential (<25mm): $0.91/m3 (0-10 m3), $1.82/m3 (>10 m3) (2021). Billing period: monthly. Billing basis: metered and non-metered.
| billing basis | metered and non-metered | Schedule "A", I and II |
| sewer rate | Residential (<25mm): $0.91/m3 (0-10 m3), $1.82/m3 (>10 m3) (2021) | By-law No. 20-256, Schedule "A", I.B |
| billing period | monthly | By-law No. 17-051, s. 3 |
scout note
Sets surcharge fees/rates for high-strength industrial/commercial wastewater discharge above normal sewer-use limits, and the abatement/rebate process; posted by the City via its most recent (2021) amending consolidation.
Regulates discharge of sewage/wastewater and industrial effluent into Hamilton's sanitary and storm sewer systems, incl. prohibited discharges and connection requirements.
Governs construction, connection to, and use of sanitary/storm sewers and drains on private and public property; current version, having replaced the repealed By-law 06-026 and its amendments.
rates page: 2026 residential (eff. Jan 1, 2026): water 15-21mm meter $0.56/day fixed + $1.21/m3 up to 10 m3, $2.42/m3 above; wastewater/stormwater $0.63/day + $1.31/m3 up to 10 m3, $2.61/m3 above. Flat rate: water $883.30/yr, wastewater $952.65/yr.