Pilot Butte Reservoir Rtpd
Fremont County, WyomingView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Pilot Butte Reservoir Rtpd in Fremont County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 50 µg/L.
- Phosphorus
- 50 µg/L
- Trend
- ↓ Declining
Stays via Stay22
Stays near Pilot Butte Reservoir Rtpd
Compare lakeside cabins, hotels, and vacation rentals near Pilot Butte Reservoir Rtpd in Fremont County, Wyoming — 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 Pilot Butte Reservoir Rtpd
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wyoming’s top lakes →
Watch Pilot Butte Reservoir Rtpd’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Pilot Butte Reservoir Rtpd has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Pilot Butte Reservoir Rtpd, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Pilot Butte Reservoir Rtpd is a lake in Fremont County, Wyoming. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2014-09-08. 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 Pilot Butte Reservoir Rtpd
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 50 µg/L. TSI 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 50 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Pilot Butte Reservoir Rtpd
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +5 µg/L/yr | 2 |
Graded lakes near Pilot Butte Reservoir Rtpd
Pilot Butte Reservoir Rtpd has no grade, but these lakes within a short drive do.
Nearby Lakes in Fremont County
Frequently asked questions about Pilot Butte Reservoir Rtpd
Where is Pilot Butte Reservoir Rtpd?
- Pilot Butte Reservoir Rtpd is a lake in Fremont County, Wyoming. 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 Pilot Butte Reservoir Rtpd?
- Pilot Butte Reservoir Rtpd in Fremont County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 50 µg/L.
Is Pilot Butte Reservoir Rtpd safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Pilot Butte Reservoir Rtpd across LakeQuality
More Wyoming Lake Rankings
Other Lakes in Wyoming
Eutrophic Lakes in Wyoming
Where this data comes from
5 measurements from 1 monitoring station, 2013–2014. 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_WATERSHED5 samples · 2013–2014
Analytical methods
- 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.