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 "asOf": "2026-10-10",
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  {
   "title": "千葉県オープンデータサイト【市原市】ＰＦＯＳ及びＰＦＯＡの給水における測定結果一覧",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4834",
   "retrievedAt": "2026-10-10"
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  {
   "title": "千葉県オープンデータサイト【市原市】水質年報",
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   "retrievedAt": "2026-10-10"
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  {
   "title": "千葉県オープンデータサイト【市原市】令和６年度水質試験結果",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4835",
   "retrievedAt": "2026-10-10"
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  {
   "title": "千葉県オープンデータサイト【市原市】令和７年度水質検査結果（速報）",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4833",
   "retrievedAt": "2026-10-10"
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  {
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   "url": "https://opendata.pref.chiba.lg.jp/datasets/4837",
   "retrievedAt": "2026-10-10"
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  {
   "title": "千葉県オープンデータサイト【市原市】有機フッ素化合物（PFOS・PFOA）測定結果",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4781",
   "retrievedAt": "2026-10-10"
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  {
   "title": "千葉県オープンデータサイト【市原市】地下水水質測定結果",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4780",
   "retrievedAt": "2026-10-10"
  },
  {
   "title": "千葉県オープンデータサイト【市原市】養老川水質測定結果",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4785",
   "retrievedAt": "2026-10-10"
  },
  {
   "title": "環境省「水質基準に関する省令の一部改正及び水道法施行規則の一部改正等における留意事項について」（環水大管発第2506305号 令和7年6月30日）",
   "url": "https://www.env.go.jp/content/000325801.pdf",
   "retrievedAt": "2026-10-10"
  },
  {
   "title": "静岡市「水道水における有機フッ素化合物検査結果」",
   "url": "https://www.city.shizuoka.lg.jp/522_000028.html",
   "retrievedAt": "2026-10-10"
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 "obligation": {
  "start": "2026-04-01",
  "frequency": "おおむね3か月に1回以上を基本（簡易水道事業等は条件により軽減・省略の規定あり）"
 },
 "latestTapPfasFiscalYear": 2024,
 "rapid4833": {
  "sampledMonths": [
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  ],
  "pfasValueCount": 0
 },
 "quarters": [
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   "label": "2026年4〜6月",
   "start": "2026-04-01",
   "end": "2026-06-30",
   "publishedInCatalog": false,
   "count": 0
  },
  {
   "label": "2026年7〜9月",
   "start": "2026-07-01",
   "end": "2026-09-30",
   "publishedInCatalog": false,
   "count": 0
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   "id": "4834",
   "title": "ＰＦＯＳ及びＰＦＯＡの給水における測定結果一覧",
   "topic": "水道 PFOS・PFOA（年度一覧）",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4834",
   "catalogUpdated": "2026-09-10",
   "newestPdf": "2024-10-08",
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  {
   "id": "4836",
   "title": "水質年報",
   "topic": "水道 水質年報（PFOS・PFOA を含む全項目）",
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   "catalogUpdated": "2026-09-10",
   "newestPdf": "2024-10-04",
   "latestMeasurement": "2023-09-25",
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   "catalogUpdated": "2026-09-10",
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   "latestMeasurement": "",
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   "id": "4833",
   "title": "令和７年度水質検査結果（速報）",
   "topic": "水道 令和7年度 水質検査結果（速報）",
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   "catalogUpdated": "2026-09-10",
   "newestPdf": "2025-05-23",
   "latestMeasurement": "2025-04",
   "files": [
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   "id": "4837",
   "title": "水質（原水、水道水）の放射性物質測定結果",
   "topic": "水道 放射性物質",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4837",
   "catalogUpdated": "2026-09-10",
   "newestPdf": "2025-07-25",
   "latestMeasurement": "2025-07",
   "files": [
    {
     "file": "H30～H23RadioactiveM(water).pdf",
     "created": "",
     "modified": "2024-05-17",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63703"
    },
    {
     "file": "R6～R1(H31)RadioactiveM(water).pdf",
     "created": "",
     "modified": "2025-05-23",
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     "modified": "2025-07-25",
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  {
   "id": "4781",
   "title": "有機フッ素化合物（PFOS・PFOA）測定結果",
   "topic": "河川・湖沼 PFOS・PFOA",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4781",
   "catalogUpdated": "2026-09-10",
   "newestPdf": "2025-06-04",
   "latestMeasurement": "2025-01",
   "files": [
    {
     "file": "pfoskekka.pdf",
     "created": "2025-06-04",
     "modified": "2025-06-04",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62589"
    }
   ]
  },
  {
   "id": "4780",
   "title": "地下水水質測定結果",
   "topic": "地下水",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4780",
   "catalogUpdated": "2026-09-10",
   "newestPdf": "2025-02-04",
   "latestMeasurement": "2023-12-12",
   "files": [
    {
     "file": "H28chikasui_sokuteikekka.pdf",
     "created": "2017-06-20",
     "modified": "2017-06-20",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63427"
    },
    {
     "file": "H29chikasui-sokuteikekka.pdf",
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     "modified": "2018-06-12",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63426"
    },
    {
     "file": "H30chikasui-sokuteikekka.pdf",
     "created": "2019-07-01",
     "modified": "2019-07-01",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63200"
    },
    {
     "file": "HP用調査一覧表（R3).pdf",
     "created": "2023-09-19",
     "modified": "2023-09-19",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62602"
    },
    {
     "file": "R1chikasui-sokuteikekka.pdf",
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     "modified": "2020-09-07",
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    },
    {
     "file": "R2chikasui-sokuteikekka.pdf",
     "created": "2021-09-13",
     "modified": "2021-09-13",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62827"
    },
    {
     "file": "h26chikasui_sokuteikekka.pdf",
     "created": "2015-09-17",
     "modified": "2015-09-17",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63429"
    },
    {
     "file": "h27chikasui_sokuteikekka.pdf",
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     "modified": "2016-08-24",
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    },
    {
     "file": "tyousakekka_R5.pdf",
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     "modified": "2025-02-04",
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    },
    {
     "file": "地下水水質調査測定一覧表（R4).pdf",
     "created": "2023-09-22",
     "modified": "2023-09-22",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62601"
    }
   ]
  },
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   "id": "4785",
   "title": "養老川水質測定結果",
   "topic": "養老川（BOD など）",
   "url": "https://opendata.pref.chiba.lg.jp/datasets/4785",
   "catalogUpdated": "2026-09-10",
   "newestPdf": "2025-02-04",
   "latestMeasurement": "2024-03-11",
   "files": [
    {
     "file": "H26yourou_gawa.pdf",
     "created": "2015-09-17",
     "modified": "2015-09-17",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63414"
    },
    {
     "file": "H27yourou_gawa.pdf",
     "created": "2016-06-28",
     "modified": "2016-06-28",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63413"
    },
    {
     "file": "H28yourou_gawa.pdf",
     "created": "2017-06-20",
     "modified": "2017-06-20",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63412"
    },
    {
     "file": "H29yourou.pdf",
     "created": "",
     "modified": "2018-06-08",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63411"
    },
    {
     "file": "R1yourou.pdf",
     "created": "",
     "modified": "2021-01-15",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63021"
    },
    {
     "file": "R2yourou.pdf",
     "created": "",
     "modified": "2021-09-13",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62823"
    },
    {
     "file": "R3yourou.pdf",
     "created": "",
     "modified": "2023-03-10",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62818"
    },
    {
     "file": "R4yourou.pdf",
     "created": "2023-09-19",
     "modified": "2023-09-19",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62598"
    },
    {
     "file": "R5yourou.pdf",
     "created": "2025-02-04",
     "modified": "2025-02-04",
     "url": "https://opendata.pref.chiba.lg.jp/resources/62593"
    },
    {
     "file": "yourou.pdf",
     "created": "2019-11-14",
     "modified": "2019-11-14",
     "url": "https://opendata.pref.chiba.lg.jp/resources/63204"
    }
   ]
  }
 ],
 "benchmarks": [
  {
   "city": "静岡市",
   "text": "3か月に1回の検査頻度で検査を実施し、四半期末日から10日以内を目安に公表（2026年度分から）",
   "url": "https://www.city.shizuoka.lg.jp/522_000028.html"
  }
 ],
 "caveat": "千葉県オープンデータサイト掲載分のみを対象にした確認。市公式サイト等で別途公表されている可能性があり、「公表データで確認できない」は「検査していない」という意味ではない。"
}