Crag Lough Lake
Crag Lough Lake in Northumberland Durham and Tees, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 7.2 µg/L.
Why Crag Lough Lake has no A–F grade
Crag Lough Lake in England is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: the Environment Agency (England).
Crag Lough Lake is a lake in Northumberland Durham and Tees County, England.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2026-07-06. 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 Crag Lough Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 32 µg/L. Chlorophyll-a: 7.2 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 32 µg/L | Not graded |
| Chlorophyll-a (Algae) | 7.2 µg/L | Not graded |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Crag Lough Lake
Compare lakeside cabins, hotels, and vacation rentals near Crag Lough Lake in Northumberland Durham and Tees, England — 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 Crag Lough Lake
Frequently asked questions about Crag Lough Lake
What is the water quality of Crag Lough Lake?
- Crag Lough Lake in Northumberland Durham and Tees, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 7.2 µg/L.
Is Crag Lough Lake safe to swim in?
- Crag Lough Lake has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.
Explore Crag Lough Lake across LakeGrade
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Where this data comes from
192 measurements from 3 monitoring stations, 2016–2026. Retrieved from the Environment Agency (England; not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Environment Agency (England)
ea-wqa192 samples · 2016–2026
Monitoring station identifiers (3)
NE-43200223NE-LSN128NE-LSN0128F
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See methodology and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2026-07-06
Monitoring stations: 3