Mohave County, Arizona · 34.43°N · Water Quality Report Card
Lake Havasu
Lake Havasu in Mohave County, Arizona is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 27.1 ft visibility.
- Clarity
- 27.1 ft
- Mean depth
- ~43 ft est.
- Type
- Oligotrophic
Lake Havasu is a cold, clear oligotrophic lake in Mohave County, Arizona with an estimated average depth of about 43 feet.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2018-06-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
Crystal clear, you can see 27.1 ft down. Trophic State Index: 30.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 27.1 ft | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 30 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~43 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Arizona has not published bathymetry for Lake Havasu.
Where to stay near Lake Havasu
Compare lakeside cabins, hotels, and vacation rentals near Lake Havasu 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.
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Fishing Lake Havasu
Location
Nearby Lakes in Mohave County
Explore Lake Havasu across LakeGrade
Depth, room, public access, and the state wake-sport rules
19.7 mi away · cable-pulled, no boat wake
Species activity outlook by water temperature and season
Where to stay at Arizona's top lakes, each with its grade
Low nutrients, clear water, excellent for swimming
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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, 2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS5 samples · 2018
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: 2018-06-12
Monitoring stations: 1