{"id":"16f03ee0-f4c9-4fef-8200-5a11e5dfedd7","type":"API","name":"Water supply systems","slug":"water-supply-systems","description":"HOUSING ECONOMY AND MUNICIPAL INFRASTRUCTURE › NETWORK DEVICES. Local Data Bank (BDL) subject P1600: yearly territorial series for Poland (voivodship to gmina level), units keyed by TERYT ids.","free_access_class":"FREE_NO_AUTH","auth_type":"NONE","homepage_url":"https://api.stat.gov.pl/Home/BdlApi","docs_url":"https://api.stat.gov.pl/Home/BdlApi","repo_url":null,"status":"ACTIVE","verification_state":"VERIFIED","tags":[],"logo_url":"https://api.stat.gov.pl/Content/images/favicon.ico","primary_source_url":"https://bdl.stat.gov.pl/bdl/dane/podgrup/temat#P1600","extraction_confidence":"0.40","created_at":"2026-07-25T14:25:16.649Z","updated_at":"2026-09-08T06:01:17.430Z","last_verified_at":"2026-09-08T02:40:28.121Z","deprecated_at":null,"ranking_score":60,"last_ranked_at":"2026-09-03T02:28:09.116Z","last_seen_at":null,"last_validated_at":null,"last_uptime_at":"2026-09-07T22:17:41.574Z","search_vector":"'access':34B,99B,147B 'accessible':212B 'across':111B,224B 'administr':71B 'administrative':184B 'analysi':107B 'analysis':220B 'and':119B,169B,209B,218B 'api':32B,145B 'authent':101B 'authentication':214B 'bank':13B,43B,44B,126B,156B,157B 'bdl':14B,47B,127B,160B 'by':141B,194B,202B 'categori':59B 'category':172B 'countri':113B 'country':226B 'cover':48B 'covering':161B 'danych':45B,158B 'data':12B,42B,69B,86B,125B,155B,182B,199B 'devic':10B,62B 'devices':123B,175B 'down':188B 'economi':5B,55B 'economy':118B,168B 'for':133B 'freeli':98B 'freely':211B 'from':186B 'gmina':24B,77B,137B,190B 'gus':90B,203B 'hous':4B,54B 'housing':117B,167B 'id':30B 'identifi':80B,84B 'identified':193B 'identifiers':197B 'ids':143B 'infrastructur':8B,58B,110B 'infrastructure':121B,171B,223B 'is':200B,210B 'it':176B 'key':27B 'keyed':140B 'level':25B,72B,138B 'levels':185B 'local':11B,41B,106B,124B,154B,219B 'lokalnych':46B,159B 'maintain':88B 'maintained':201B 'municip':7B,57B 'municipal':120B,170B 'nation':93B,103B 'national':206B,216B 'network':9B,61B,122B,174B 'of':151B,221B 'offer':64B 'offers':177B 'offic':95B 'office':208B 'p1600':16B,37B,129B,150B 'poland':21B,39B,91B,134B,152B,204B 'provid':33B 'provides':146B 'region':104B 'regional':217B 's':153B,205B 'seri':19B,68B 'series':132B,181B 'span':70B 'spanning':183B 'specif':60B 'specifically':173B 'statist':94B 'statistical':207B 'subject':15B,36B,128B,149B 'suppli':2A,50B 'supply':115A,163B 'support':102B 'supporting':215B 'system':3A,51B 'systems':116A,164B 'territori':18B,66B,83B 'territorial':131B,179B,196B 'teryt':29B,82B,142B,195B 'the':166B,198B,225B 'this':144B 'time':67B,180B 'to':136B,148B,189B 'under':165B 'unit':26B,79B 'units':139B,192B 'voivodship':22B,74B,135B,187B 'water':1A,49B,109B,114A,162B,222B 'with':191B 'without':100B,213B 'year':17B,65B 'yearly':130B,178B","popularity_score":"0.0000","maintenance_score":"0.7000","institution_id":"2b3815fc-d28d-444c-b8f1-906ef8cff848","institution_type":"STATISTICS_OFFICE","country_code":"PL","official_confidence":40,"proof_summary":"40% - Official domain (stat.gov.pl)","source_seed_url":null,"is_public_sector":true,"published_at":"2026-07-26T14:50:00.000Z","geographic_scope":"NATIONAL","name_en":null,"description_en":"This API provides access to subject P1600 of Poland's Local Data Bank (Bank Danych Lokalnych, BDL), covering water supply systems under the housing economy and municipal infrastructure category, specifically network devices. It offers yearly territorial time series data spanning administrative levels from voivodship down to gmina, with units identified by TERYT territorial identifiers. The data is maintained by GUS, Poland's national statistical office, and is freely accessible without authentication, supporting national, regional and local analysis of water infrastructure across the country.","native_lang":"en","access_level":"direct","formats":[],"capability_tier":"live","trust_score":58.25,"merged_into_entry_id":null,"identity_key":"API|https://bdl.stat.gov.pl/bdl/dane/podgrup/temat#P1600|water supply systems","upstream_ref":"bdl.stat.gov.pl:subject:P1600","access":{"level":"direct","primary":{"kind":"query","label":"Run verified request","method":"GET","url":"https://bdl.stat.gov.pl/api/v1/subjects/P1600","source":"probe","runnable":true},"actions":[{"kind":"query","label":"Run verified request","method":"GET","url":"https://bdl.stat.gov.pl/api/v1/subjects/P1600","source":"probe","runnable":true},{"kind":"query","label":"Values of one variable across territorial units","method":"GET","url":"https://bdl.stat.gov.pl/api/v1/data/by-variable/1612162?unit-level=6&page-size=10&format=json&lang=en","source":"query_example","runnable":true,"direct":false},{"kind":"query","label":"Documentation","method":"GET","url":"https://api.stat.gov.pl/Home/BdlApi","source":"query_example","runnable":true,"direct":false},{"kind":"landing","label":"Open source record","method":"GET","url":"https://bdl.stat.gov.pl/bdl/dane/podgrup/temat#P1600","source":"primary_source","runnable":false}],"formats":[]},"maturity":{"entry_id":"16f03ee0-f4c9-4fef-8200-5a11e5dfedd7","granularity":"entry","granularity_label":"One unit = one catalog entry. A PROXY for the SCOPE.md §4 ladder, which governs source families, not entries: a family with 400 entries moves this reading 400 times as much as a family with one. Never compare or combine with the source_family reading.","level":"joinable","level_index":5,"level_label":"Joinable","meaning":"Canonical identifiers and concepts mapped","counts_as_coverage":true,"blocked_by":null,"rungs":[{"level":"discovered","level_index":1,"label":"Discovered","meaning":"Source and metadata recorded","evidence":"membership of the named population the ladder is taken over","counts_as_coverage":false,"met":true,"reached":true,"criterion":"TRUE"},{"level":"verified","level_index":2,"label":"Verified","meaning":"Access tested successfully","evidence":"entries.verification_state = 'VERIFIED'","counts_as_coverage":false,"met":true,"reached":true,"criterion":"entries.verification_state = 'VERIFIED'"},{"level":"profiled","level_index":3,"label":"Profiled","meaning":"Schema, dimensions and licence understood","evidence":"a data profile with at least one field (entry_data_profiles.field_count > 0)","counts_as_coverage":false,"met":true,"reached":true,"criterion":"EXISTS (SELECT 1 FROM entry_data_profiles p WHERE p.entry_id = entries.id AND COALESCE(p.field_count, 0) > 0)"},{"level":"executable","level_index":4,"label":"Executable","meaning":"Queries run through Commodity","evidence":"entries.capability_tier = 'live' — today's proxy for \"queryable through us\"","counts_as_coverage":true,"met":true,"reached":true,"criterion":"entries.capability_tier = 'live'"},{"level":"joinable","level_index":5,"label":"Joinable","meaning":"Canonical identifiers and concepts mapped","evidence":"a field link to a canonical identifier whose sampled VALUES match its format","counts_as_coverage":true,"met":true,"reached":true,"criterion":"EXISTS (SELECT 1 FROM entry_field_links efl WHERE efl.entry_id = entries.id AND efl.identifier_id IS NOT NULL AND efl.value_status = 'match')"},{"level":"reproducible","level_index":6,"label":"Reproducible","meaning":"Snapshots and transformation evidence retained","evidence":"at least one retained evidence manifest (migration 078)","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM evidence_manifests em WHERE em.entry_id = entries.id)"},{"level":"guaranteed","level_index":7,"label":"Guaranteed","meaning":"Monitored against an operational reliability target","evidence":"an active reliability target with a named monitor (migration 096)","counts_as_coverage":true,"met":false,"reached":false,"criterion":"EXISTS (SELECT 1 FROM entry_reliability_targets rt WHERE rt.entry_id = entries.id AND rt.is_active = true)"}],"officialness":{"basis":"catalog_inherited","label":"Inherited from the upstream catalog: this item came from a trusted official government catalog, and that provenance — not per-item proof — is the warrant. Its own proof score is below 80 or it matched no registered institution (apps/worker/src/connectors/catalog/qualify-store.ts).","proof_confidence":40,"proven_threshold":80,"institution_id":"2b3815fc-d28d-444c-b8f1-906ef8cff848","definition":"CASE WHEN COALESCE(entries.is_public_sector, false) IS NOT TRUE THEN 'not_official' WHEN COALESCE(entries.official_confidence, 0) >= 80 AND entries.institution_id IS NOT NULL THEN 'per_item_proven' ELSE 'catalog_inherited' END"},"source_family":{"key":"bdl.stat.gov.pl","label":"One unit = one source family, approximated by the serving host of the entry's primary source URL (e.g. bdl.stat.gov.pl). A COMPUTED stand-in for the curated families of SCOPE.md §5, which no table holds yet. A family sits at the highest level any of its entries has reached, because a family is integrated to the depth of its deepest working integration. Never compare or combine with the entry reading."},"generated_at":"2026-09-09T05:24:59.129Z"},"api_details":{"id":"2a5d36c9-1527-4404-bad5-e949f5d8ca5b","entry_id":"16f03ee0-f4c9-4fef-8200-5a11e5dfedd7","base_url":"https://bdl.stat.gov.pl/api/v1/subjects/P1600","openapi_url":null,"graphql_url":null,"api_version":null,"spec_format":null,"endpoints_count":null,"endpoints":[],"rate_limit_info":null,"free_tier_limits":null,"ping_url":"https://bdl.stat.gov.pl/api/v1/subjects/P1600","created_at":"2026-07-25T14:25:16.821Z","updated_at":"2026-07-25T14:25:16.821Z"},"dataset_details":null,"license":{"id":"cc-by-4.0","spdx_id":"CC-BY-4.0","name":"Creative Commons Attribution 4.0","url":"https://creativecommons.org/licenses/by/4.0/","is_open":true,"is_redistributable":true,"requires_attribution":true,"category":"cc","notes":null,"created_at":"2026-06-12T16:29:19.729Z"},"reuse":{"license_id":"cc-by-4.0","license_name":"Creative Commons Attribution 4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","commercial_use":{"status":"yes","value":true},"redistribution":{"status":"yes","value":true},"attribution_required":{"status":"yes","value":true},"share_alike":{"status":"no","value":false},"personal_data_warning":{"status":"yes","value":true},"cache_and_mirror":{"status":"yes","value":true},"undetermined":[],"basis":"licence_text","confidence":0.95,"confidence_tier":"high","source_text":"Deed: \"Share - copy and redistribute the material in any medium or format for any purpose, even commercially\" and \"Adapt - remix, transform, and build upon the material for any purpose, even commercially\". Under the following terms: \"Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made.\" Notices: \"other rights such as publicity, privacy, or moral rights may limit how you use the material.\" Attribution is the only term listed; no ShareAlike term appears.","source_url":"https://creativecommons.org/licenses/by/4.0/","reviewed_at":null},"license_raw":"CC BY 4.0 (GUS BDL)","latest_check":{"id":"0dc96ae3-3d13-4796-b19a-5f8cf2561c6e","entry_id":"16f03ee0-f4c9-4fef-8200-5a11e5dfedd7","status":"VERIFIED","last_checked_at":"2026-09-08T02:40:27.920Z","p50_latency_ms":1602,"p95_latency_ms":null,"last_error":null,"consecutive_failures":0,"created_at":"2026-07-29T16:06:38.437Z","updated_at":"2026-09-08T02:40:27.920Z","consecutive_successes":9,"probe_url":"https://bdl.stat.gov.pl/api/v1/subjects/P1600","probe_method":"GET","probe_http_status":200,"probe_content_type":"application/json; charset=utf-8","probe_succeeded_at":"2026-09-08T02:40:27.920Z"},"data_profile":{"id":"2ed0e56d-1493-4a10-bfeb-eea0f44100fe","entry_id":"16f03ee0-f4c9-4fef-8200-5a11e5dfedd7","profile_source":"bdl","profile_kind":"dataset","dataset_id":"P1600","fields":[{"name":"variable_id","role":"parameter","type":"string","label":null,"param_in":"path","required":true,"description":"GUS variable id selecting the measured series of subject P1600 (the n1/n2 dimension combination): 1612162=length of the exploited water network (distribution and transmition) [km]; 489=length of working distribution network [km]; 8896=length of active distribution water network administrated by the gmina [km]; 8897=length of active distribution water network administrated by the gmina, including network operated by public utility entities [km]; 490=connections leading to residential buildings and collective accomodation facilities [pcs]; 475705=water supply network breakdowns [pcs]; 1612163=water supplied [dam3]; 491=water supplied to households [dam3]; 1612164=street outlets [pcs]; 396249=consumption of water in households per capita [m3]; 396248=consumption of water in households in urban area per capita [m3]; 396250=consumption of water in households in rural area per capita [m3]; 493=dwellings in residential buildings newly connected to water network [-]; 492=population using the water supply system in urban areas [person]; 9152=population using the water supply system [person]; … (29 variables — GET https://bdl.stat.gov.pl/api/v1/variables?subject-id=P1600 for the full list).","enum_values":["1612162","489","8896","8897","490","475705","1612163","491","1612164","396249","396248","396250","493","492","9152","1621928","1621929","1621930","1621931","1621932","1621933","1641698","1646068","1646069","1726309","1726310","1726312","1726313","1726314"]},{"name":"unit_level","role":"parameter","type":"integer","label":null,"param_in":"query","description":"Territorial aggregation level: 0=Poland, 1=macroregion, 2=voivodship (województwo), 3=region, 4=subregion, 5=powiat, 6=gmina.","enum_values":["0","1","2","3","4","5","6"]},{"name":"year","role":"parameter","type":"integer","label":null,"param_in":"query","description":"Reference year of the value (yearly series, back to 1995 for the oldest subjects). Filters server-side via the API's year parameter."},{"name":"unit_id","type":"string","label":null,"description":"12-digit BDL territorial-unit id (macroregion+voivodship+region+subregion+powiat+gmina+type digits). An equality filter pins the unit server-side (unit-parent-id)."},{"name":"unit_name","type":"string","label":null,"description":null},{"name":"teryt_terc","type":"string","label":null,"description":"TERYT TERC territorial code derived from the unit id (2 digits = voivodship, 4 = powiat, 7 = gmina incl. type digit; empty for NUTS-only units)."},{"name":"value","type":"number","label":null,"description":null},{"name":"attr_id","type":"integer","label":null,"description":"GUS value-attribute id (data quality/annotation flag)."}],"field_count":8,"sample_records":[{"year":2020,"value":99.6,"attr_id":1,"unit_id":"011212001011","unit_name":"Bochnia","teryt_terc":"1201011","unit_level":"6","variable_id":"1612162"},{"year":2021,"value":100.4,"attr_id":1,"unit_id":"011212001011","unit_name":"Bochnia","teryt_terc":"1201011","unit_level":"6","variable_id":"1612162"},{"year":2022,"value":100.4,"attr_id":1,"unit_id":"011212001011","unit_name":"Bochnia","teryt_terc":"1201011","unit_level":"6","variable_id":"1612162"},{"year":2023,"value":100.4,"attr_id":1,"unit_id":"011212001011","unit_name":"Bochnia","teryt_terc":"1201011","unit_level":"6","variable_id":"1612162"},{"year":2024,"value":104.2,"attr_id":1,"unit_id":"011212001011","unit_name":"Bochnia","teryt_terc":"1201011","unit_level":"6","variable_id":"1612162"},{"year":2025,"value":104.3,"attr_id":1,"unit_id":"011212001011","unit_name":"Bochnia","teryt_terc":"1201011","unit_level":"6","variable_id":"1612162"},{"year":2020,"value":253.3,"attr_id":1,"unit_id":"011212001022","unit_name":"Bochnia","teryt_terc":"1201022","unit_level":"6","variable_id":"1612162"},{"year":2021,"value":255.5,"attr_id":1,"unit_id":"011212001022","unit_name":"Bochnia","teryt_terc":"1201022","unit_level":"6","variable_id":"1612162"}],"record_count":null,"data_size_bytes":null,"dataset_count":null,"query_examples":[{"url":"https://bdl.stat.gov.pl/api/v1/data/by-variable/1612162?unit-level=6&page-size=10&format=json&lang=en","curl":"curl -s 'https://bdl.stat.gov.pl/api/v1/data/by-variable/1612162?unit-level=6&page-size=10&format=json&lang=en'","label":"Values of one variable across territorial units","method":"GET","description":"Yearly values of variable 1612162 (length of the exploited water network (distribution and transmition) [km]) per territorial unit. Filters: unit-level=0–6, year=YYYY, unit-parent-id={12-digit unit id}; page-size ≤ 100. Anonymous limits: 5 req/s, 100 req/15 min."},{"url":"https://api.stat.gov.pl/Home/BdlApi","curl":"curl -s 'https://api.stat.gov.pl/Home/BdlApi'","label":"Documentation","method":"GET","description":"GUS BDL API reference (endpoints, parameters, limits, CC BY 4.0 licence)."}],"status":"ok","error_message":null,"profiled_at":"2026-09-02T19:27:21.091Z","run_id":"8c9f660b-3b08-4e05-8f5a-2c168d459806","created_at":"2026-07-25T21:55:08.607Z","updated_at":"2026-09-02T19:27:21.091Z","license_raw":"CC BY 4.0 (GUS BDL)","license_id":"cc-by-4.0","consecutive_failure_count":0,"last_error_at":null,"last_error_message":null,"previewable":true,"personal_data":{"status":"none","basis":"no_person_column_cited","grain":"none","allowed":true,"columns":{"direct_identifiers":[],"family_names":[],"given_names":[],"attributes":[],"unresolved_names":[],"measures":[],"entity_identifiers":[]},"publication":null,"publication_evidence":null,"notice":"personal data: no cited column names a natural person (the cited columns are all this reads)"}},"datasets":[],"limits":[],"manifest":{"answer_sha256":"ba8c4a0568dcbd498eca207219c44cd6d4cfc7e32c9027fde1bdf039e1237772","answer_sha256_rule":"sha256 (hex, UTF-8) of JSON.stringify(this body) after deleting the keys listed in manifest.stamped_keys from manifest, and deleting manifest itself if it is then empty. The hash was computed before the stamp existed, so no field of the stamp is inside it.","stamped_keys":["answer_sha256","answer_sha256_rule","stamped_keys","row_count","row_count_basis","live","live_basis","created_at","created_at_basis","durable_citation"],"row_count":29,"row_count_basis":"Objects that are elements of a JSON array anywhere in this body, excluding manifest. Not a claim about which collection is the answer. Largest single collection: data_profile.fields[] (8 rows).","live":false,"live_basis":"This body was replayed from the worker edge cache (x-edge-cache: hit); the bytes, and therefore answer_sha256, are those of the execution that filled the cache.","created_at":"2026-09-09T05:26:32.611Z","created_at_basis":"When this response body was assembled, deliberately OUTSIDE the hashed bytes so the same answer hashes identically on every request. Not the upstream read time — that is provenance[].retrieved_at. A zone-cached replay carries the assembly time, not your receipt time.","durable_citation":"This manifest is produced at response time and is NOT stored. A durable, replayable citation is persisted only on an explicit cite: GET /api/v1/entries/{id-or-slug}/evidence, or the MCP cite_query tool. Both are entry-scoped, because evidence_manifests is entry-shaped; a domain answer spanning several sources has no single entry and cannot be persisted through that path."}}