Hardness · 96 mg/L as CaCO3 Hard water · soft <60 · hard 60–180 · very hard >180 mg/L
Longer-term only (too few samples from 2019 onward) · 1998–2015 · 39 samples
Hard water can leave scale on kettles, faucets, and appliances.
Learn more →Water system Lambton Area Water Supply System
Nothing major stood out
No notable issues stood out in the recent public records we reviewed.
Worth knowing day to day
Plant averages from the provincial monitoring program (not this year’s report and not your kitchen tap). When enough samples exist from 2019 onward, we prefer that recent window and compare it to the longer record.
Sodium level · 6.4 mg/L Typical levels · diet notice 20 · taste ≤200 mg/L
Longer-term only (too few samples from 2019 onward) · 2008–2015 · 11 samples
Learn more →Chloride · 9 mg/L Typical levels · taste ≤250 mg/L (Ontario)
Longer-term only (too few samples from 2019 onward) · 1998–2019 · 64 samples
Learn more →Nitrate + Nitrite · 0.38 mg/L as N Typical levels · standard 10 mg/L as N (Ontario)
Recent average · 2019–2023 · 3 samples
Recent 2019–2023 · Typical levels · 0.38 mg/L as N · Same band as longer term Longer term · Typical levels · 0.3 mg/L as N · 2003–2023 · 47 samples
Learn more →Fluoride · 0.62 mg/L In the dental target range · target 0.5–0.8 · max 1.5 mg/L
Longer-term only (too few samples from 2019 onward) · 1998–2019 · 64 samples
Learn more →pH balance · 7.6 In the usual range · usual 6.5–8.5 (Ontario)
Recent average · 2019 · 10 samples
Recent 2019 · In the usual range · 7.6 · Same band as longer term Longer term · In the usual range · 7.8 · 2003–2019 · 92 samples
Learn more →Next steps
Detailed records
Years covered: 2024-25, 2023-24, 2022-23, 2021-22.
Other public-record context
Inspection history
Provincial inspection scores have generally been high in the years available.
- MRS inspection ratings in recent years: 100.0%, 100.0%, 100.0%, 95.1%.
- Inspection ratings come from the MRS Inspection Rating Water Quality table.
- Inspection ratings summarize provincial inspections, not every individual test.
Source and operator context
Owner: Lambton Area Water Supply (joint Management Board)
Source-water context has not yet been linked from local intake-station data.
Evidence
- Owner on record: LAMBTON AREA WATER SUPPLY (JOINT MANAGEMENT BOARD) (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 Sarnia.
-
SARNIA DISTRIBUTION SYSTEM (system)Confidence: highWhy shown: Direct DWS number and system-name match.Limitation: This is a related public-record result, not a confirmed household service-boundary match.
-
R243 HIGH PARK PS (1061) (system)Confidence: highWhy shown: Direct DWS number and system-name match.Limitation: This is a related public-record result, not a confirmed household service-boundary match.
-
R243 HIGH PARK PS (1061) (school)Confidence: highWhy 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.
-
R243 KING GEORGE VI PS (1283) (system)Confidence: highWhy shown: Direct DWS number and system-name match.Limitation: This is a related public-record result, not a confirmed household service-boundary match.
-
R243 KING GEORGE VI PS (1283) (school)Confidence: highWhy 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.
-
R243 ALEXANDER MACKENZIE SS (5204) (system)Confidence: highWhy 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.