Bathing Water Monitoring 2026

Season 2026 by zone

Comparison of the 5 TYRN SEA zones: monitored areas, analyses performed so far, and percentage of exceedances on microbiological limits (E. coli and intestinal enterococci).
Counts from the Ministry portal only, to keep a homogeneous basis across zones: the list of samples below also includes ARPACAL analyses and therefore shows more rows.

Map of exceedance points — 2026 season

The map presents two different kinds of information (see legend).

● Circles are sampling points with at least one exceedance in the 2026 season: they are events with a date. The colour indicates the severity of the exceedance, from light yellow (1-2 times the microbiological limit) to dark red (over 50 times).

▲ Triangles are the areas currently closed to bathing according to the Ministry portal status: they answer the question «can I swim here today?». Red = closed for pollution, yellow = closed for other reasons.

Click a marker for details.

Bathing bans 2026 for pollution

Mayoral ordinances issued during the season for temporary bathing bans, as reported by the Bathing Waters Portal of the Italian Ministry of Health. They are management measures (art. 5(b) Italian D.Lgs. 116/2008): they may follow a documented microbiological exceedance or be precautionary (e.g. a spill detected at a river or channel mouth) and are not always accompanied by a published lab analysis — the ordinance itself is the official act banning bathing. A ban remains in force until the first compliant re-sample.

* Rain ≥ 10 mm in the 24 hours preceding the sample. During intense rainfall, combined sewer overflow (CSO) outlets open to prevent flooding, discharging a rain+untreated-sewage mix at sea (Italian D.Lgs. 152/2006 provides for this as emergency discharge). Bans marked with an asterisk may have been caused by this mechanism — a meteorological event, not a structural treatment failure. Rain close to zero or absent instead indicates a structural origin of the discharge (undersized treatment plant, network leak, abusive discharge).

List of non-compliant samples 2026

Each row is a non-compliant analysis, from the Ministry of Health Bathing Water Portal or from the weekly ARPACAL files: follow-up re-samples are published only by ARPACAL. The source of each row is shown by the badge in the «Type» column. EI = intestinal enterococci (limit 200 CFU/100 ml); EC = Escherichia coli (limit 500 CFU/100 ml). The "x" factor indicates how many times the limit was exceeded.

Note on combined sewer overflow (CSO). During heavy rain, the overflow weirs of combined sewer systems open to avoid flooding, discharging a mix of rain and untreated sewage to the sea. It is not an abuse: it is foreseen by Italian Legislative Decree 152/2006 as an emergency discharge. ARPACAL samples taken the day after rain > 10 mm should be read in this light: the exceedance reflects the weather event, not a structural treatment failure. For exceedances without significant rain, instead, the likely cause is untreated discharge (undersized treatment plant, network leak, or illegal discharge).