{"columns":[{"name":"Päivämäärä","type":"string"},{"name":"Ranta","type":"string"},{"name":"Mittauskohde","type":"string"},{"name":"Mittaustulos","type":"string"}],"n_rows":5,"rows_kept":5,"cut":false,"text_format":"parquet-jsonl-2026-10-02","bounds":{"document_bytes":16777216,"package_text_limit_bytes":33554432,"package_text_slack_bytes":1024,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096,"vector_min":64,"vector_head_fixed":16,"vector_head_variable":64,"kv_value_chars":1048576,"nesting_max":64,"binary_text":true},"cells_cut":0,"cells_bad_utf8":0,"cells_raw":0,"cells_binary":0,"cells_binary_text":0,"cells_vector":0,"n_row_groups":1,"reader":"pyarrow 23.0.1, python 3.13","created_by":"hyparquet","schema":{"fields":[{"name":"Päivämäärä","type":"string","nullable":true,"metadata":null,"children":null},{"name":"Ranta","type":"string","nullable":true,"metadata":null,"children":null},{"name":"Mittauskohde","type":"string","nullable":true,"metadata":null,"children":null},{"name":"Mittaustulos","type":"string","nullable":true,"metadata":null,"children":null}],"parquet":"required group field_id=-1 root {\n  optional binary field_id=-1 Päivämäärä (String);\n  optional binary field_id=-1 Ranta (String);\n  optional binary field_id=-1 Mittauskohde (String);\n  optional binary field_id=-1 Mittaustulos (String);\n}\n"},"kv_metadata":[["live","false"],["upstream_url","stored sample"],["retrieved_at","2026-08-16T17:32:15.751Z"],["row_count","5"],["entry_url","https://c0mm0.com/entry/oulun-uimavesien-laatutiedot/"],["license","cc-by-4.0"],["source","Oulun uimavesien laatutiedot"]]}
["2016-06-06T00:00:00","Kalliomonttu, Kempele","lämpötila ºC","15"]
["2016-06-06T00:00:00","Kalliomonttu, Kempele","E.coli pmy/100 ml","<1"]
["2016-06-06T00:00:00","Kalliomonttu, Kempele","Suolistop. enterokokit pmy/100 ml","<1"]
["2016-06-06T00:00:00","Rantakylä, Liminka","lämpötila ºC","16"]
["2016-06-06T00:00:00","Rantakylä, Liminka","E.coli pmy/100 ml","1"]