Clark County Lake Quality
Nevada, 10 lakes — no lake here has enough monitoring data for a grade
Clark County has 10 monitored lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. No lake in Clark County has enough sampling behind it for an A–F grade yet. The 10 monitored lakes below carry whatever clarity, phosphorus, and chlorophyll-a measurements exist.
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.
Where to stay near Clark County
Top-rated places to stay near Clark County
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 trip to Clark County?
Get lake water-quality report cards plus the best cabin & lodging deals near Clark County — straight to your inbox. No spam, unsubscribe anytime.
Quick Answers for Clark County
Planning a trip? Check special fishing regulations for Indian Gardens Tinaja Lake — or check the official Nevada fishing regulations.
All Lakes in Clark County
10 lakes · 0 graded, 10 not rated0 graded lakes · 10 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRIndian Gardens Tinaja LakeClark | NR | No recent samples | 92 µg/L | No recent samples | No recent samples | Not recorded | |
| NRMckay Wash Tinaja LakeClark | NR | No recent samples | 155 µg/L | No recent samples | No recent samples | Not recorded | |
| NRIonactis Tinaja LakeClark | NR | No recent samples | 42 µg/L | No recent samples | No recent samples | Not recorded | |
| NRHidden Valley Tinaja LakeClark | NR | No recent samples | 530 µg/L | No recent samples | No recent samples | Not recorded | |
| NRBerris Tinaja LakeClark | NR | No recent samples | 24 µg/L | No recent samples | No recent samples | Not recorded | |
| NRBowman ReservoirClark | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake Las VegasClark | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRMursha ReservoirClark | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRLake MohaveClark | NR | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRLake MeadClark | NR | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public |
NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Nevada
See how Clark County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..
Source: EPA National Aquatic Resource Surveys, 2026.