Where is Lago di Montorfano?

Lago di Montorfano is a lake in Como, Italy. This page reports official water-quality measurements, shown as reported.

Is Lago di Montorfano safe to swim in?

Lago di Montorfano 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.

Lago di Montorfano

Como, ItalyView map Directions

ARPA publishes the water-quality measurements for Lago di Montorfano. Here is what has been measured.

Clarity

2 m

Typical for Italy

Secchi · sampled 2021

Phosphorus

25 µg/L

Typical for Italy

Measured by ARPA

Limited data

See the measurements Directions Where to stay

Lago di Montorfano in Como, Italy has official water-quality measurements, shown as reported. Water clarity: 2 m visibility. Phosphorus: 25 µg/L.

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How Lago di Montorfano is classified

Lago di Montorfano 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 Montorfano 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 2021-10-26. Methodology: how these readings are compared.

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Lago di Montorfano 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.

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Water quality measurements for Lago di Montorfano

These are the measurements ARPA publishes for Lago di Montorfano. More on the source.

Murky, only visible to about 6.6 ft. Phosphorus 25 µg/L. TSI 50.

Water quality readings
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

Ask about Lago di Montorfano

Answers come straight from the public measurements and survey records on this page.

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Stays near Lago di Montorfano

Compare lakeside cabins, hotels, and vacation rentals near Lago di Montorfano in Como, Italy — 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 Lago di Montorfano

→ Lago di Montorfano fishing regulations (limits, seasons, special rules)

Frequently asked questions about Lago di Montorfano

Where is Lago di Montorfano?: Lago di Montorfano is a lake in Como, Italy. This page reports official water-quality measurements, shown as reported.
What is the water quality of Lago di Montorfano?: Lago di Montorfano in Como, Italy has official water-quality measurements, shown as reported. Water clarity: 2 m visibility. Phosphorus: 25 µg/L.
Is Lago di Montorfano safe to swim in?: Lago di Montorfano 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

43 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 Lombardiaarpa-lom43 samples · 2018–2021

Analytical methods

ARPA Lombardia lake monitoring

Monitoring station identifiers (1)

POLSMOLN1lo1

Authority classifications are shown as the authority published them. See where the data comes from and data sources.