Lago Maggiore
Varese, ItalyView mapDirections
ARPA publishes the water-quality measurements for Lago Maggiore. Here is what has been measured.
- Limited data
Lago Maggiore in Varese, Italy has official water-quality measurements, shown as reported. Water clarity: 5.9 m visibility. Phosphorus: 5.5 µg/L. Chlorophyll-a (algae): 2.3 µg/L.
How Lago Maggiore is classified
Lago Maggiore 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, phosphorus and 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 Maggiore is a lake in Varese 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 2020-10-13. Methodology: how these readings are compared.
What Lago Maggiore is good for
From access and monitoring records, not editorial picks.
- Clear water19.2 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lago Maggiore 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 Maggiore
These are the measurements ARPA publishes for Lago Maggiore. More on the source.
Crystal clear, you can see 19.2 ft down. Phosphorus 5.5 µg/L. Chlorophyll-a 2.3 µg/L. TSI 34.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.85m | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 5.5µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2.3µg/L | Measured, not scored 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. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lago Maggiore
Answers come straight from the public measurements and survey records on this page.
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Frequently asked questions about Lago Maggiore
Where is Lago Maggiore?
- Lago Maggiore is a lake in Varese, Italy. This page reports official water-quality measurements, shown as reported.
What is the water quality of Lago Maggiore?
- Lago Maggiore in Varese, Italy has official water-quality measurements, shown as reported. Water clarity: 5.9 m visibility. Phosphorus: 5.5 µg/L. Chlorophyll-a (algae): 2.3 µg/L.
Is Lago Maggiore safe to swim in?
- Lago Maggiore 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
29 measurements from 2 monitoring stations, 2018–2020. Retrieved from Italian regional ARPA lake monitoring (not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- ARPA Lombardia
arpa-lom29 samples · 2018–2020
Analytical methods
- ARPA Lombardia lake monitoring
Monitoring station identifiers (2)
POTI2LN1in3POTI2LN1in2
Authority classifications are shown as the authority published them. See where the data comes from and data sources.