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          "evidence_id": "evidence-del-valle-ebrpd-east-beach-algae",
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      ],
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        },
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        },
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          "observation_id": "observation-ebrpd-water-quality-current-del-valle",
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        }
      ],
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          "content": "At retrieval, the EBRPD page posted a blue-green algae Caution Advisory for the East Swim Beach and stated that the West Swim Beach had no water because of low lake levels.",
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        },
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        },
        {
          "artifact_refs": [],
          "content": "At retrieval, the table listed a Caution algae advisory at Del Valle East Beach and no advisory at West Beach, where there was no water because of low lake levels.",
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          "claim_id": "claim-ebrpd-algae-advisory-fish-guidance",
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          "artifact_refs": [],
          "content": "During an algae advisory, EBRPD advises avoiding unnecessary water contact and washing hands after handling fish or wet equipment. Fish fillets should be washed with tap or bottled water, guts and liver discarded, and fish cooked thoroughly. Reservoir fish are tested annually; at retrieval the page reported no microcystin detected to date in fish flesh from District-managed waters.",
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      ],
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      ]
    },
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      "claim": {
        "claim_id": "claim-ebrpd-algae-dog-exposure",
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      ],
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          "content": "Exposure to toxic algae by ingestion, inhalation, or skin contact can cause rashes, eye or skin irritation, allergic reactions, breathing difficulty or congestion, gastrointestinal illness, and in high exposures serious illness or death. Dogs face special risk from drinking, swimming, wading, grooming contaminated fur or paws, or eating dried shoreline algae.",
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      ]
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      },
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      ],
      "observations": [
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      ]
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    },
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      "action": "ADD",
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      "knowledge_gap_refs": [],
      "path": "canonical/v0/sources/source-ebrpd-blue-green-algae.json",
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    }
  ],
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    "next_id": "source-ebrpd-briones-park-page",
    "position": 14,
    "previous_id": "source-ebrpd-black-diamond-park-page",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "Blue-green algae are cyanobacteria. Low water, limited circulation, increased temperature and light, low oxygen, and high phosphorus can favor blooms and potential toxin release; toxin production remains incompletely understood.",
      "observation_id": "observation-ebrpd-algae-bloom-context",
      "observed_at": null,
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-blue-green-algae"
    },
    {
      "artifact_refs": [],
      "content": "At retrieval, the current-conditions table listed a Caution Advisory for the Del Valle East Swim Beach and no advisory for the West Swim Beach, where it reported no water because of low lake levels.",
      "observation_id": "observation-ebrpd-algae-current-del-valle",
      "observed_at": "2026-09-20T00:00:00+00:00",
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-blue-green-algae"
    },
    {
      "artifact_refs": [],
      "content": "During an algae advisory, EBRPD advises avoiding unnecessary water contact and washing hands after handling fish or wet equipment. Fish fillets should be washed with tap or bottled water, guts and liver discarded, and fish cooked thoroughly. Reservoir fish are tested annually; at retrieval the page reported no microcystin detected to date in fish flesh from District-managed waters.",
      "observation_id": "observation-ebrpd-algae-fish-guidance",
      "observed_at": "2026-09-20T00:00:00+00:00",
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-blue-green-algae"
    },
    {
      "artifact_refs": [],
      "content": "Exposure to toxic algae by ingestion, inhalation, or skin contact can cause rashes, eye or skin irritation, allergic reactions, breathing difficulty or congestion, gastrointestinal illness, and in high exposures serious illness or death. Dogs face special risk from drinking, swimming, wading, grooming contaminated fur or paws, or eating dried shoreline algae.",
      "observation_id": "observation-ebrpd-algae-health-risk",
      "observed_at": null,
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-blue-green-algae"
    },
    {
      "artifact_refs": [],
      "content": "EBRPD reports regular lake and shoreline monitoring with warnings and closures posted when appropriate. Drinking water from the Del Valle treatment plant is regularly tested for effects from reservoir blooms.",
      "observation_id": "observation-ebrpd-algae-monitoring",
      "observed_at": null,
      "observer": "user-supplied page transcription",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-blue-green-algae"
    }
  ],
  "record": {
    "locator": "https://www.ebparks.org/natural-resources/water-quality/blue-green-algae",
    "publisher": "East Bay Regional Park District",
    "source_id": "source-ebrpd-blue-green-algae"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/natural-resources/water-quality/blue-green-algae",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-blue-green-algae"
    }
  ]
}