Lake Louise
Pierce County, WashingtonView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · Nutrients (phosphorus, nitrogen)
- Limited data
Lake Louise in Pierce County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 17.1 ft visibility.
- Clarity
- 17.1 ft
- Trend
- ↑ Improving
Stays via Stay22
Stays near Lake Louise
Compare lakeside cabins, hotels, and vacation rentals near Lake Louise in Pierce County, Washington — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Lake Louise
Prices for Sep 11–13, 4 adults. Change dates on the map below.
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Watch Lake Louise’s letter
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Why Lake Louise has no grade
Lake Louise has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Lake Louise is Not Rated — not an F. Its 17.1-foot median from 1 readings collected 2021 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by WA Ecology and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Louise is a lake in Pierce County, Washington. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled 2021-08-08. Grade methodology: LakeQuality methodology.
What Lake Louise is good for
From access and monitoring records, not editorial picks.
- Clear water17.1 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Lake Louise is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water quality measurements for Lake Louise
These readings exist but are not enough for an A–F grade — see why.
Crystal clear, you can see 17.1 ft down. TSI 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.1 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Fishing Lake Louise
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.369 m/yr | 4 |
EPA Impairment Status
Lake Louise is officially listed as impaired under Clean Water Act §303(d) in the 2018 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WA17110019001213_001_001 · Official waterbody report · Matched by proximity (0.97 km)
Graded lakes near Lake Louise
Lake Louise has no grade, but these lakes within a short drive do.
Nearby Lakes in Pierce County
Frequently asked questions about Lake Louise
Where is Lake Louise?
- Lake Louise is a lake in Pierce County, Washington. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Lake Louise?
- Lake Louise in Pierce County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 17.1 ft visibility.
Is Lake Louise safe to swim in?
- The letter is not a swimming clearance. Lake Louise is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Explore Lake Louise across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 2021
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database