Hewitt Lake
Hewitt Lake in Iron County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16.5 ft visibility. Maximum depth: 88 ft. Surface area: 79 acres.
- Clarity
- 16.5 ft
- Max depth
- 88 ft
- Area
- 79 acres
- Public access
- Yes
Next lake in Iron County
Why Hewitt Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Hewitt Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Hewitt Lake is a 79-acre lake in Iron County, Wisconsin with a maximum depth of 88 feet. The lake supports 3 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 3 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-07-23. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Hewitt Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Crystal clear, you can see 16.5 ft down. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Hewitt Lake
Compare lakeside cabins, hotels, and vacation rentals near Hewitt Lake in Iron County, Wisconsin — 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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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 88 ft |
| Surface Area | 79 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Chaney LakePublic
- Hewitt LakePublic
- Owl LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Hewitt Lake
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2024).
Fish Species (DNR-rated)
EPA Impairment Status
Hewitt Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10003768 · Official waterbody report · Matched by proximity (1.8 km)
Graded lakes near Hewitt Lake
Hewitt Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Iron County
Frequently asked questions about Hewitt Lake
What is the water quality grade for Hewitt Lake?
- Hewitt Lake in Iron County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 16.5 ft visibility. Maximum depth: 88 ft. Surface area: 79 acres.
Is Hewitt Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Hewitt Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Hewitt Lake?
- Hewitt Lake has a maximum depth of 88 feet. The lake covers 79 acres.
What fish are in Hewitt Lake?
- Fish species found in Hewitt Lake include Musky, Panfish, Largemouth Bass. Hewitt Lake is located in Iron County, Wisconsin.
Are there boat ramps on Hewitt Lake?
- Hewitt Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Chaney Lake, Hewitt Lake, Owl Lake. Public access is listed as yes.
Explore Hewitt Lake across LakeGrade
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Where this data comes from
2 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX2 samples · 2024
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory