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Reservoirs

Where your water comes from

Each reservoir supplies a few municipalities.

Look up your municipality and we will tell you which reservoir your water comes from, as AAA publishes it.

The map

Who the reservoirs serve.

Tap a reservoir to see its municipalities.

Supply area
Supply area published

Each marker's border is the reservoir's alert band, per the bulletin of October 15, 2026.

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The list below says the same thing.

Go to the list

The reservoirs, one by one

  • Carraízo

    179,387 accounts · 2020
    Sits in

    Trujillo Alto

    Supplies

    San Juan, Trujillo Alto, Carolina, Canóvanas, and Gurabo

    The reservoir's supply area is not the interruption plan's: that one covers seven municipalities, adding Loíza and Juncos.

    See level

  • La Plata

    130,828 accounts · 2020
    Sits in

    Toa Alta

    Supplies

    Dorado, Guaynabo, Naranjito, Toa Alta, Toa Baja, Vega Alta, Bayamón, Cataño, and Corozal

    See level

  • Cidra

    14,537 accounts · 2020
    Sits in

    Cidra

    Supplies

    Aguas Buenas, Caguas, Cayey, and Cidra

    See level

  • Patillas

    14,313 accounts · 2020
    Sits in

    Patillas

    Supplies

    Arroyo, Guayama, Maunabo, and Patillas

    See level

  • Toa Vaca

    19,304 accounts · 2020
    Sits in

    Villalba

    Supplies

    Ponce, Juana Díaz, Coamo, and Villalba

    See level

  • Carite

    15,431 accounts · 2020
    Sits in

    Guayama

    Supplies

    Caguas, Cayey, Cidra, Guayama, Patillas, and San Lorenzo

    See level

  • Río Blanco

    29,391 accounts · 2020
    Sits in

    Naguabo

    Supplies

    Humacao, Yabucoa, Naguabo, Vieques, Culebra, and Las Piedras

    See level

  • Caonillas

    Sits in

    Utuado

    Caonillas is a hydroelectric lake that passes its water to Dos Bocas, not a drinking-water source. That is why AAA publishes no municipalities and no client count for it.

    See level

  • Fajardo

    31,514 accounts · 2020
    Sits in

    Fajardo

    Supplies

    Ceiba, Fajardo, and Luquillo

    See level

  • Guajataca

    63,218 accounts · 2020
    Sits in

    Quebradillas, Isabela, and San Sebastián

    Supplies

    Moca, Aguadilla, Aguada, Isabela, San Sebastián, Quebradillas, and Bo. Puntas de Rincón

    See level

  • Cerrillos

    51,430 accounts · 2020
    Sits in

    Ponce

    Supplies

    Ponce and Peñuelas

    See level

AAA's infrastructure page · 2020 graphic and 2023 text · extracted on September 1, 2026.

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