Mohave County, Arizona · Water Quality Report Card
Lake Mead
Lake Mead in Mohave County, Arizona is not rated for water quality — its monitoring record does not meet the evidence bar.
- Mean depth
- ~207 ft est.
Lake Mead is a lake in Mohave County, Arizona with an estimated average depth of about 207 feet.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2026-03-27. Grade methodology: LakeGrade methodology.
Watch Lake Mead water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data |
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~207 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Arizona has not published bathymetry for Lake Mead.
Where to stay near Lake Mead
Compare lakeside cabins, hotels, and vacation rentals near Lake Mead in Mohave County, Arizona — 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 Lake Mead
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 Lake Mead?
Get lake water-quality report cards plus the best cabin & lodging deals near Lake Mead — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at Arizona’s top lakes →
Fishing Lake Mead
Location
Nearby Lakes in Mohave County
Explore Lake Mead across LakeGrade
Planning a trip around Lake Mead?
Lake Mead is about 11 miles from Lake Mead National Recreation Area. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Lake Mead →More Arizona Lake Rankings
Other Lakes in Arizona
More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
5 measurements from 1 monitoring station, 2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Great Lakes Environmental Center
GLEC5 samples · 2026
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 300.0 ~ EPA; Determination of Inorganic Anions by Ion Chromatography
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2026-03-27
Monitoring stations: 1