Dams

Dams with their thresholds and latest reading.

Request

GET /v1/history/dams

curl "https://tubig-api.rjhon.net/v1/history/dams"

5 calls a minute per visitor. Follow next for more.

Parameters

None. It always returns the whole list.

Response

An object with items (the fields below), next (the next page, or null) and sources (whom to credit).

Field	Type	What it is
`id`	string	The dam's identifier, for /dams/{dam}/readings
`name`	string	The dam's name
`thresholds`	map of string to number	Its key levels in metres: critical, minimum_operating, spilling and others
`latest`	object or null	The latest reading
`latest.observed_at`	datetime (UTC, ISO 8601)	When the level was read (UTC)
`latest.level_m`	number	Water level, metres above sea level
`latest.rule_curve_m`	number or null	The rule curve level for the day, when PAGASA gives it
`latest.normal_high_m`	number or null	The normal high water level, when given
`latest.change_24h_m`	number or null	Change over 24 hours, as PAGASA gives it
`latest.source`	string	Where the reading came from (pagasa_dams, seed, manual)

Live example

Open in the browser

The first 2 items of what Tubig holds now.

{
  "items": [
    {
      "id": "ambuklao",
      "name": "Ambuklao Dam",
      "thresholds": {},
      "latest": {
        "observed_at": "2026-10-02T00:00:00Z",
        "level_m": 751.6,
        "rule_curve_m": 745.0,
        "normal_high_m": 752.0,
        "change_24h_m": -0.1,
        "source": "pagasa_dams"
      }
    },
    {
      "id": "angat",
      "name": "Angat Dam",
      "thresholds": {
        "critical": 160.0,
        "minimum_operating": 180.0,
        "normal_high": 210.0,
        "spilling": 217.0
      },
      "latest": {
        "observed_at": "2026-10-02T00:00:00Z",
        "level_m": 208.53,
        "rule_curve_m": 186.54,
        "normal_high_m": 210.0,
        "change_24h_m": -0.11,
        "source": "pagasa_dams"
      }
    }
  ],
  "next": null,
  "sources": [
    {
      "name": "PAGASA, dam information",
      "url": "https://pagasa.dost.gov.ph/flood",
      "licence": null
    }
  ]
}