Get Full Government Meeting Transcripts, Videos, & Alerts Forever!
Get email alerts on the Water Quality topic
No spam. Unsubscribe anytime.
Saugeen Valley Conservation Authority: Hanover site shows no long‑term water-quality exceedance, wider subwatershed has localized issues
Summary
Saugeen Valley Conservation Authority presented 20 years of monitoring showing Hanover’s single surface site remains below federal and provincial objectives for key parameters, while the broader subwatershed has experienced 13 E. coli exceedances and rising phosphorus in 2022–23.
Emily Williamson, water quality technician at the Saugeen Valley Conservation Authority, told Hanover council that 20 years of monitoring for the Saugeen watershed show the town’s monitored site (S9 on the main Saugeen River) has annual averages for chloride, phosphorus, nitrogen, total suspended solids and E. coli below provincial and federal objectives.
Williamson explained that total phosphorus provincial objective is 0.03 mg/L and the federal guideline for chloride is 120 mg/L; Hanover’s annual averages are consistently well below those benchmarks. She noted the watershed program samples monthly (first week of the month) and therefore does not target weather events, which can raise single‑event readings.
Williamson said the larger Saugeen subwatershed has recorded 13 annual E. coli exceedances since 2002 and recent phosphorus rises in 2022–23 at some subwatershed sites; however, Hanover’s monitored site did not show a parameter of key concern. She described SVCA’s three monitoring components—surface water sampling, groundwater sampling (in partnership with the province) and benthic invertebrate biomonitoring—and said benthic species richness in nearby sites rose from 14 to 20 species between 2015 and 2024.
On follow‑up, Williamson said if exceedances appear in SVCA data the authority’s approach is to monitor long‑term trends rather than trigger site‑specific remediation; she recommended municipalities support Category 3 monitoring, consider land‑use planning tools that limit nutrient loading (setbacks, buffers, tile‑drain restrictions) and pursue coordinated provincial/federal funding for stewardship and restoration.
