Loch Lomond Lake
Santa Cruz County, CaliforniaView mapDirections
SWRCB publishes the water-quality measurements for Loch Lomond Lake. Here is what has been measured.
- Public access
- Limited data
Loch Lomond Lake in Santa Cruz County, California has water-quality measurements published by SWRCB, shown here as reported. Water clarity: 7.4 ft visibility.
Loch Lomond Lake is a lake in Santa Cruz County, California. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-07-29. Methodology: how these readings are compared.
What Loch Lomond Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Loch Lomond Lake is safe to swim in today is a call for the California State Water Resources Control Board and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Loch Lomond Lake
These are the measurements SWRCB publishes for Loch Lomond Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7.4 ft. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Loch Lomond Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- Loch Lomond Recreation AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Fishing Loch Lomond Lake
Nearby Lakes in Santa Cruz County
Frequently asked questions about Loch Lomond Lake
Where is Loch Lomond Lake?
- Loch Lomond Lake is a lake in Santa Cruz County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Loch Lomond Lake?
- Loch Lomond Lake in Santa Cruz County, California has water-quality measurements published by SWRCB, shown here as reported. Water clarity: 7.4 ft visibility.
Is Loch Lomond Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Loch Lomond Lake?
- Loch Lomond Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Loch Lomond Recreation Area. Public access is listed as yes.
Can I fish at Loch Lomond Lake?
- Loch Lomond Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by California's fish and wildlife agency, so check its current regulations before you go.
Explore Loch Lomond Lake across LakeQuality
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Where this data comes from
6 measurements from 1 monitoring station, 2021–2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS6 samples · 2021–2024
Monitoring station identifiers (1)
- NALMS-F227451
- CEDEN-304PLL184
- USGS-370613122041801
- USGS-370623122041601
- USGS-370627122040701
- USGS-370631122035901
- USGS-370636122035701
- USGS-370640122035701
- USGS-370644122035401
- USGS-370650122035301
- USGS-370654122034401
- USGS-370658122034001
- USGS-370708122034301
- USGS-370719122034301
- USGS-370723122034201
- USGS-370727122034001
- USGS-370731122033701
- USGS-370732122033801
- USGS-370732122033802
- USGS-370732122033901
- USGS-370733122033501
- USGS-370733122033502
- USGS-370733122033901
- USGS-370734122033101
- USGS-370734122033601
- USGS-370734122033602
- USGS-370735122033201
- USGS-370735122033202
- USGS-370735122034201
- USGS-370736122033001
- USGS-370736122033002
- USGS-370737122032701
- USGS-370737122033101
- USGS-370739122032501
- USGS-370740122032201
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory