Environment in St Catharines 13 indicators covering environment for St Catharines. IndicatorLatest Year10-yr change Rank Drought - Cities and FUAs — Land soil moisture anomaly 1.3 Percentage change 2025 up 186.7% 292nd Greenhouse gas emissions - Cities and FUAs — GHG emissions from waste 0.02 Tonnes of CO2-equivalent 2024 unchanged 703rd Total and environment-related patents - FUAs — Patent applications 12 Patents 2022 up 69.0% 428th Land surface temperature - Cities and FUAs — Daytime summer land 29.19 Degrees celsius 2024 down 8.2% 792nd Land surface temperature - Cities and FUAs — Daytime winter land 4.32 Degrees celsius 2024 up 200.0% 956th Land surface temperature - Cities and FUAs — Daytime yearly land 20.76 Degrees celsius 2024 down 3.9% 747th Land surface temperature - Cities and FUAs — Nighttime summer land 17.1 Degrees celsius 2024 down 2.0% 589th Land surface temperature - Cities and FUAs — Nighttime winter land -5.37 Degrees celsius 2024 up 31.9% 1241st Land surface temperature - Cities and FUAs — Nighttime yearly land 6.99 Degrees celsius 2024 up 15.0% 914th Air pollution - Cities and FUAs — Population exposure to nitrogen 12.5 Microgrammes per cubic metre 2025 — 941st Air pollution - Cities and FUAs — Population exposure to ozone 55.24 Microgrammes per cubic metre 2025 — 1059th Air pollution - Cities and FUAs — Population exposure to PM10 30.54 Microgrammes per cubic metre 2025 — 957th Air pollution - Cities and FUAs — Population exposure to PM2.5 9.25 Microgrammes per cubic metre 2025 — 1135th