Lago di Alserio
Como, ItalyView mapDirections
ARPA publishes the water-quality measurements for Lago di Alserio. Here is what has been measured.
- Limited data
Lago di Alserio in Como, Italy has official water-quality measurements, shown as reported. Water clarity: 2 m visibility. Phosphorus: 25 µg/L.
How Lago di Alserio is classified
Lago di Alserio in Italy is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the regional environmental agencies (ARPA Lombardia, ARPA Veneto, Arpae Emilia-Romagna, and ARPA Umbria).
Lago di Alserio is a lake in Como County, Italy.
Source: the regional environmental agencies (ARPA Lombardia, ARPA Veneto, Arpae Emilia-Romagna, and ARPA Umbria) — not the EPA Water Quality Portal, last sampled 2021-11-02. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lago di Alserio is safe to swim in today is a call for the regional environmental agencies (ARPA Lombardia, ARPA Veneto, Arpae Emilia-Romagna, and ARPA Umbria) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lago di Alserio
These are the measurements ARPA publishes for Lago di Alserio. More on the source.
Murky, only visible to about 6.6 ft. Phosphorus 25 µg/L. TSI 50.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 25µg/L | Measured, not scored 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. | 50 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Lago di Alserio
Where is Lago di Alserio?
- Lago di Alserio is a lake in Como, Italy. This page reports official water-quality measurements, shown as reported.
What is the water quality of Lago di Alserio?
- Lago di Alserio in Como, Italy has official water-quality measurements, shown as reported. Water clarity: 2 m visibility. Phosphorus: 25 µg/L.
Is Lago di Alserio safe to swim in?
- Lago di Alserio 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
42 measurements from 1 monitoring station, 2018–2021. Retrieved from Italian regional ARPA lake monitoring (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- ARPA Lombardia
arpa-lom42 samples · 2018–2021
Analytical methods
- ARPA Lombardia lake monitoring
Monitoring station identifiers (1)
POLSALLN1lo1
Authority classifications are shown as the authority published them. See where the data comes from and data sources.