Cache County Lake Quality
Utah, 6 lakes, measured by Utah DWQ
Cache County holds 6 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. 5 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Most monitored lakes in Cache County carry favourable nutrient and algae readings for Utah.
Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Newton Reservoir has the lowest nutrient and algae readings in the county.
Where to stay near Cache County
Top-rated places to stay near Cache County
Prices for Oct 30–Nov 1, 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 trip to Cache County?
Get lake water-quality updates plus the best cabin & lodging deals near Cache County — straight to your inbox. No spam, unsubscribe anytime.
Quick Answers for Cache County
Planning a trip? Check special fishing regulations for Newton Reservoir — or check the official Utah fishing regulations.
All Lakes in Cache County
6 lakes · 5 ranked on readings, 1 without enough sampling5 lakes ranked on readings · 1 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|
| 1 | Newton ReservoirCache | 15.4 ft | 26 µg/L | 1.7 µg/L | No recent samples | Not recorded |
| 2 | Hyrum ReservoirCache | 6.9 ft | 17.9 µg/L | 2.2 µg/L | No recent samples | ✓ Public |
| 3 | Third Dam LakeCache | 4.3 ft | 10.4 µg/L | 1.1 µg/L | No recent samples | Not recorded |
| 4 | Porcupine ReservoirCache | 8.5 ft | 13.3 µg/L | 3.8 µg/L | No recent samples | Not recorded |
| 5 | Cutler ReservoirCache | 1.2 ft | 109 µg/L | 17.4 µg/L | No recent samples | Not recorded |
| Cutler ReservoirCache | 1 ft | 100 µg/L | 11.2 µg/L | No recent samples | Not recorded |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of lakes that fit, with the water quality behind each one.
Other Counties in Utah
Browse every Utah lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: the Utah Division of Water Quality. See data sources.