West Newton Lake
Park County, WyomingView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↓ down from A at the last regrade
- Oligotrophic
- #3 of 5 in the county
- Limited data
West Newton Lake in Park County, Wyoming has a water quality grade of B (Good). Water clarity: 17.7 ft visibility. Phosphorus: 10 µg/L.
- Clarity
- 17.7 ft
- Type
- Oligotrophic
- Phosphorus
- 10 µg/L
- Trend
- ↑ Improving
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Watch West Newton Lake’s letter
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West Newton Lake is a cold, clear oligotrophic lake in Park County, Wyoming. Water quality is graded B based on 1 sampling years through 2021. Overall water quality is improving over recent sampling years. Compared to the 4 other monitored lakes in Park County, West Newton Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2021-09-14. Grade methodology: LakeQuality methodology.
What West Newton Lake is good for
From access and monitoring records, not editorial picks.
- Clear water17.7 ft of visibility
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Crystal clear, you can see 17.7 ft down. Phosphorus 10 µg/L. TSI 37. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.7 ft | Not graded |
| Phosphorus | 10 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Fishing West Newton Lake
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -3.37 µg/L/yr | 3 |
County Ranking
Ranked #3 of 5 lakes in Park County
Nearby Lakes in Park County
Frequently asked questions about West Newton Lake
Where is West Newton Lake?
- West Newton Lake is a lake in Park County, Wyoming. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for West Newton Lake?
- West Newton Lake in Park County, Wyoming has a water quality grade of B (Good). Water clarity: 17.7 ft visibility. Phosphorus: 10 µg/L.
Is West Newton Lake safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore West Newton Lake across LakeQuality
3 thermal springs within 2.8 mi, nearest Shoshone Hot Springs
Species activity outlook by water temperature and season
Where to stay at Wyoming's top lakes, each with its grade
Low nutrients, clear water. The letter is not a swimming clearance.
Wyoming's cleanest and most-polluted lakes, ranked
More Wyoming Lake Rankings
Other Grade B Lakes in Wyoming
Oligotrophic Lakes in Wyoming
Where this data comes from
6 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED6 samples · 2021
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
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.