Martha Lake
Martha Lake in Fresno County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 135 acres.
- Area
- 135 acres
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Why Martha Lake has no grade
We grade a lake only when the monitoring record supports a letter: 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 Martha Lake, no water-quality sampling on record for this lake.
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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Martha Lake is a 135-acre lake in Fresno County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Martha Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Martha Lake
Compare lakeside cabins, hotels, and vacation rentals near Martha Lake in Fresno County, California — 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 Martha Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 135 acres |
No bathymetric survey has been published for Martha Lake, so its depth is not documented here.
Fishing Martha Lake
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Frequently asked questions about Martha Lake
Where is Martha Lake?
- Martha Lake is a lake in Fresno County, California. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Martha Lake?
- Martha Lake in Fresno County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 135 acres.
Is Martha Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Martha Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Martha Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.