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City St. Catharines

Water system St. Catharines Distribution System

Municipal drinking-water system

Worth a closer look

Recent public records include a few items that deserve attention.

17 Over-limit tests

Escherichia Coli, Lead, Total coliform · over the last 4 years

View details →

23 Incident records

over the last 4 years

View details →
▸ How to read these numbers
  • Over-limit tests. That is a regulatory flag in the public record. A count alone does not say how long a result lasted, whether it was retested, or that every tap in the building was affected. Open the detailed records for timing and context.
  • Incident records. Ontario systems must file these reports for many operational signals (sampling flags, instrument notices, follow-ups, and similar). A report is not the same as an “accident,” and a high count does not by itself mean people at this building had a water emergency. Open the detailed records for what was filed.

Worth knowing day to day

Hardness, sodium, and similar day-to-day readings are missing for St. Catharines Distribution System because it did not join the provincial monitoring program that produces these cards — so there is no data to show.

Next steps

How to read this record → Ask your municipality →
What's behind these numbers

Years covered: 2024-25, 2023-24, 2022-23, 2021-22.

What the numbers refer to

Over-limit tests

Regulatory flags when a monitored result was above an Ontario standard. A count alone does not say how long a result lasted or that every tap was affected.

17 over-limit tests in recent records.

  • 13,087 recent test results processed.
  • Parameters involved: Escherichia Coli, Lead, Total coliform.

Incident records

Incident records are required system filings — not a count of taps affected, and not automatically a drinking-water emergency.

  • 23 incident records in public records — not a count of taps affected.
Other public-record context

Inspection history

Provincial inspection scores have varied between years — see the percentages below.

  • MRS inspection ratings in recent years: 91.2%, 100.0%, 100.0%, 100.0%.
  • Inspection ratings come from the MRS Inspection Rating Water Quality table.
  • Other recent records include: 17 over-limit tests and 23 incident records.
  • Inspection ratings summarize provincial inspections, not every individual test.

Source and operator context

Owner: St. Catharines, The Corporation Of The City Of

Source-water context has not yet been linked from local intake-station data.

Evidence

  • Owner on record: ST. CATHARINES, THE CORPORATION OF THE CITY OF (Owner Legal Name, Test Results).
  • Operating authority was not present in the local records we processed.
  • Source-water context has not yet been linked from local intake-station data.
  • Contact details (phone, website, email) are not available in the local provincial open-data files we processed.

Nearby reports

Other public records related to St. Catharines.

  • Confidence: high
    Why shown: Direct DWS number and system-name match.
    Limitation: This is a related public-record result, not a confirmed household service-boundary match.
  • Confidence: high
    Why shown: Direct DWS number and system-name match.
    Limitation: This is a related public-record result, not a confirmed household service-boundary match.
  • Confidence: high
    Why shown: Direct DWS number and system-name match.
    Limitation: This is a related public-record result, not a confirmed household service-boundary match.
  • Confidence: high
    Why shown: Direct DWS number and system-name match.
    Limitation: This is a related public-record result, not a confirmed household service-boundary match.
  • Confidence: high
    Why shown: System category is 'Public School': building water record.
    Limitation: School/child-care records reflect building plumbing tests, not operation of a municipal treatment plant.
  • Confidence: high
    Why shown: Direct DWS number and system-name match.
    Limitation: This is a related public-record result, not a confirmed household service-boundary match.

Reports related to this area, grouped by municipality field. Not a confirmed household service-boundary match.

About this record set

Data coverage

Based on public records for 4 recent fiscal years: 2024-25, 2023-24, 2022-23, 2021-22.

  • Covers recent fiscal years only; older years are not summarized here.

Record identifiers

System number:
260003279
System category:
LMRS (Municipal drinking-water system)
Owner on record:
ST. CATHARINES, THE CORPORATION OF THE CITY OF
Public health unit:
REGIONAL NIAGARA PUBLIC HEALTH DEPARTMENT
Regulation:
Reg 170/03