Boultham Mere Reserve
Boultham Mere Reserve in Lincs and Northants, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 265 µg/L. Chlorophyll-a (algae): 9.8 µg/L.
Why Boultham Mere Reserve has no A–F grade
Boultham Mere Reserve 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).
Boultham Mere Reserve is a lake in Lincs and Northants County, England.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2026-07-08. 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 Boultham Mere Reserve
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 265 µg/L. Chlorophyll-a: 9.8 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 265 µg/L | Not graded |
| Chlorophyll-a (Algae) | 9.8 µg/L | Not graded |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Boultham Mere Reserve
Compare lakeside cabins, hotels, and vacation rentals near Boultham Mere Reserve in Lincs and Northants, 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 Boultham Mere Reserve
Frequently asked questions about Boultham Mere Reserve
What is the water quality of Boultham Mere Reserve?
- Boultham Mere Reserve in Lincs and Northants, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 265 µg/L. Chlorophyll-a (algae): 9.8 µg/L.
Is Boultham Mere Reserve safe to swim in?
- Boultham Mere Reserve 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.
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Where this data comes from
8 measurements from 1 monitoring station, 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-wqa8 samples · 2026
Monitoring station identifiers (1)
AN-LSN0407
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: 2026-07-08
Monitoring stations: 1