Blacks Fork Inflow Lake
Sweetwater County, WyomingView 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.
- Limited data
Blacks Fork Inflow Lake in Sweetwater County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.2 ft visibility.
- Clarity
- 5.2 ft
- Trend
- ↑ Improving
Stays via Stay22
Stays near Blacks Fork Inflow Lake
Compare lakeside cabins, hotels, and vacation rentals near Blacks Fork Inflow Lake in Sweetwater 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 Blacks Fork Inflow Lake
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 Blacks Fork Inflow Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Blacks Fork Inflow Lake has no grade
Blacks Fork Inflow Lake 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, Blacks Fork Inflow Lake is Not Rated — not an F. Its 5.2-foot median from 9 readings collected 2012–2016 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 Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Blacks Fork Inflow Lake is a lake in Sweetwater County, Wyoming. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2016-07-05. 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 Blacks Fork Inflow Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 5.2 ft. TSI 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.2 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Blacks Fork Inflow Lake
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.094 m/yr | 4 |
Nearby Lakes in Sweetwater County
Frequently asked questions about Blacks Fork Inflow Lake
Where is Blacks Fork Inflow Lake?
- Blacks Fork Inflow Lake is a lake in Sweetwater County, Wyoming. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Blacks Fork Inflow Lake?
- Blacks Fork Inflow Lake in Sweetwater County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.2 ft visibility.
Is Blacks Fork Inflow Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Blacks Fork Inflow Lake across LakeQuality
More Wyoming Lake Rankings
Other Lakes in Wyoming
Eutrophic Lakes in Wyoming
Where this data comes from
9 measurements from 1 monitoring station, 2012–2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- UC Region of USBOR
UC_REGION_USBOR_WQX9 samples · 2012–2016
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.