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LakeQuality

Alouette Reservoir

Lower Fraser, British ColumbiaView mapDirections

NR
Not rated

No A–F letter for this lake. The letter is scored against EPA reference conditions for a lake’s ecoregion, and those stop at the US border. Here is what has been measured.

Water temp
No reading
No gauge
Clarity
No reading
No sample
Level
No reading
No gauge
Trend
No reading
Not enough history
  • Limited data

Alouette Reservoir in Lower Fraser, British Columbia has water-quality measurements published by ENV and no A–F letter. The letter's EPA reference conditions stop at the US border. Phosphorus: 4.1 µg/L. Chlorophyll-a (algae): 2.1 µg/L.

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Why Alouette Reservoir has no A–F letter

The LakeQuality letter is scored against EPA National Lakes Assessment reference conditions for a lake’s ecoregion, and those stop at the US border. There is no reference condition for British Columbia, so the scale cannot be applied to Alouette Reservoir at any level of sampling. Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.

This is not a gap in the monitoring record. ENV publishes these measurements directly, and everything below that has been measured is reported on this page as ENV reports it.

Monitoring: the British Columbia Ministry of Environment and Parks. Read the full grading methodology.

Alouette Reservoir is a lake in Lower Fraser County, British Columbia.

Source: the British Columbia Ministry of Environment and Parks — not the EPA Water Quality Portal, last sampled 2026-08-19. Grade methodology: LakeQuality methodology.

Swimming Safety

Not rated

Limited data

The letter is not a swimming clearance. Check local advisories before you swim.

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Water quality measurements for Alouette Reservoir

These are the measurements ENV publishes for Alouette Reservoir. No A–F letter applies here: see why.

No clarity data. Phosphorus 4.1 µg/L. Chlorophyll-a 2.1 µg/L. TSI 31.

MetricValueGrade
Water Clarity (Secchi Depth)No recent samples
Phosphorus4.1 µg/LMeasured, not scored
Chlorophyll-a (Algae)2.1 µg/LMeasured, not scored
Trophic State Index (TSI)31Oligotrophic

Low nutrients, clear water. The letter is not a swimming clearance.

Fishing Alouette Reservoir

Nearby Lakes in Lower Fraser

Frequently asked questions about Alouette Reservoir

Where is Alouette Reservoir?

Alouette Reservoir is a lake in Lower Fraser, British Columbia. Its water-quality measurements are published by ENV, and it carries no A–F letter, because no reference condition exists for lakes in this region, so the assessment thresholds behind the A–F scale cannot be applied here.

What is the water quality grade for Alouette Reservoir?

Alouette Reservoir in Lower Fraser, British Columbia has water-quality measurements published by ENV and no A–F letter. The letter's EPA reference conditions stop at the US border. Phosphorus: 4.1 µg/L. Chlorophyll-a (algae): 2.1 µg/L.

Is Alouette Reservoir safe to swim in?

The letter is not a swimming clearance. Check local advisories before you swim.

Oligotrophic Lakes in British Columbia

Where this data comes from

327 measurements from 2 monitoring stations, 2017–2026. Retrieved from British Columbia EnMoDS (not the EPA Water Quality Portal) on 2026-09-06.

Collected and reported by

  • British Columbia Ministry of Environment and Parksenmods-bc327 samples · 2017–2026
Monitoring station identifiers (2)
  • E254169
  • E270283

Canadian lakes are published with the measurements their provincial programme reports, and without a LakeQuality A–F letter. The letter is scored against EPA reference conditions for a lake’s ecoregion, and the EPA does not survey these lakes. See how grades are calculated and data sources.