States/PR

Sewer overflows in Puerto Rico

Sewer overflow record — reported spills, the worst utilities, and how often overflows reached waterways in Puerto Rico.

Reported events
646
Total volume
148.7M gal
Reached waterways
12(2%)
Latest event
Jun 24, 2026

Worst utilities in Puerto Rico

Ranked by number of reported overflow events.

#UtilityEventsVolumeReached water
1PRASA FAJARDO NUEVA WWTP COLLECTION SYSTEM584.2M gal0
2PRASA CAGUAS WWTP COLLECTION SYSTEM5217.3M gal0
3PRASA MAYAGUEZ WWTP COLLECTION SYSTEM51979K gal0
4PRASA CAROLINA WWTP COLLECTION SYSTEM461.2M gal0
5PRASA DORADO WWTP COLLECTION SYSTEM401.8M gal0
6PRASA ARECIBO WWTP COLLECTION SYSTEM363.8M gal0
7PRASA CAMUY-HATILLO WWTP COLLECTION SYSTEM3378.1M gal2
8PRASA AGUADILLA WWTP COLLECTION SYSTEM27246K gal0
9PRASA BAYAMON WWTP COLLECTION SYSTEM271.0M gal0
10PRASA HUMACAO WWTP COLLECTION SYSTEM23977K gal0
11PRASA VEGA ALTA WWTP COLLECTION SYSTEM224.0M gal3
12PRASA BARCELONETA WWTP COLLECTION SYSTEM213.5M gal1
13PRASA LAJAS WWTP COLLECTION SYSTEM18695K gal0
14PRASA PUERTO NUEVO WWTP COLLECTION SYSTEM1611.9M gal0
15PRASA VEGA BAJA WWTP COLLECTION SYSTEM1463K gal0
16PRASA COROZAL WWTP COLLECTION SYSTEM13265K gal0
17PRASA CIALES WWTP COLLECTION SYSTEM12313K gal0
18PRASA VIEQUES WWTP COLLECTION SYSTEM114.7M gal0
19PRASA SAN GERMAN WWTP COLLECTION SYSTEM11233K gal0
20PRASA PATILLAS WWTP COLLECTION SYSTEM1057K gal0
21PRASA MOROVIS WWTP COLLECTION SYSTEM107.7M gal4
22PRASA TOA ALTA WWTP COLLECTION SYSTEM9687K gal0
23PRASA YABUCOA WWTP COLLECTION SYSTEM8702K gal0
24PRASA CAYEY WWTP COLLECTION SYSTEM8149K gal0
25PRASA JAYUYA NUEVA WWTP COLLECTION SYSTEM81.3M gal2
26PRASA GUAYAMA WWTP COLLECTION SYSTEM890K gal0
27PRASA LARES WWTP COLLECTION SYSTEM7595K gal0
28PRASA ISABELA WWTP COLLECTION SYSTEM7169K gal0
29PRASA SANTA ISABEL WWTP COLLECTION SYSTEM731K gal0
30PRASA NARANJITO WWTP COLLECTION SYSTEM5302K gal0

Biggest spills in Puerto Rico

The largest single reported overflow events.