Naltesby Lake
Lower Chilako River, British ColumbiaView mapDirections
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.
- Limited data
Naltesby Lake in Lower Chilako River, 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. Water clarity: 2.6 m visibility. Phosphorus: 18.7 µg/L. Chlorophyll-a (algae): 5.5 µg/L.
- Clarity
- 2.6 m
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Why Naltesby Lake 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 Naltesby Lake at any level of sampling. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
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.
Naltesby Lake is a lake in Lower Chilako River County, British Columbia.
Source: the British Columbia Ministry of Environment and Parks — not the EPA Water Quality Portal, last sampled 2026-08-13. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Naltesby Lake
These are the measurements ENV publishes for Naltesby Lake. No A–F letter applies here: see why.
Moderate clarity, visible to about 8.6 ft. Phosphorus 18.7 µg/L. Chlorophyll-a 5.5 µg/L. TSI 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.62 m | Measured, not scored |
| Phosphorus | 18.7 µg/L | Measured, not scored |
| Chlorophyll-a (Algae) | 5.5 µg/L | Measured, not scored |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Naltesby Lake
Nearby Lakes in Lower Chilako River
Frequently asked questions about Naltesby Lake
Where is Naltesby Lake?
- Naltesby Lake is a lake in Lower Chilako River, 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 Naltesby Lake?
- Naltesby Lake in Lower Chilako River, 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. Water clarity: 2.6 m visibility. Phosphorus: 18.7 µg/L. Chlorophyll-a (algae): 5.5 µg/L.
Is Naltesby Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Naltesby Lake across LakeQuality
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Mesotrophic Lakes in British Columbia
Where this data comes from
79 measurements from 1 monitoring station, 2018–2026. 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 Parks
enmods-bc79 samples · 2018–2026
Monitoring station identifiers (1)
E206955
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.