CEDEN Water Chemistry Data (Parquet File Format - All Years)
This resource contains all water chemistry data available from the CEDEN database, in the Apache Parquet file format. The data is partitioned by year.
Parquet is a free and open source data storage format that allows for fast and efficient processing of large datasets. It is compatible with a variety of data analysis platforms, including the R and Python programming languages, through the Apache Arrow platform. An example showing how to use this data with the R programming language is available here.
No inline preview is available for this format. Download the file (opens in a new tab) to view its contents.
Data dictionary
Field definitions supplied by the publishing agency in CKAN.
| Column | Type | Label | Description |
|---|---|---|---|
| filename | text | filename | — |
| compressed_size | numeric | compressed_size | — |
| file_size | numeric | file_size | — |
| compression_ratio | text | compression_ratio | — |
| date_time | timestamp | date_time | — |
| create_system | numeric | create_system | — |
| create_version | numeric | create_version | — |
| extract_version | numeric | extract_version | — |
| flag_bits | numeric | flag_bits | — |
| internal_attr | numeric | internal_attr | — |
| external_attr | numeric | external_attr | — |
| CRC | numeric | CRC | — |
| compress_type | numeric | compress_type | — |
Resource details
| Format | ZIP |
|---|---|
| Size | 364 MB |
| Rows | 55 |
| Last updated | Sep 30, 2026 |
| Part of | Surface Water - Chemistry Results |
Other resources in this dataset
- CEDEN Water Chemistry Data Dictionary
- CEDEN Water Chemistry Data (Zipped CSV - All Years)
- 2026 CEDEN Water Chemistry Data
- 2025 CEDEN Water Chemistry Data
- 2024 CEDEN Water Chemistry Data
- 2023 CEDEN Water Chemistry Data
- 2022 CEDEN Water Chemistry Data
- 2021 CEDEN Water Chemistry Data
- 2020 CEDEN Water Chemistry Data
- 2019 CEDEN Water Chemistry Data
- 2018 CEDEN Water Chemistry Data
- 2017 CEDEN Water Chemistry Data
- 2016 CEDEN Water Chemistry Data
- 2015 CEDEN Water Chemistry Data
- 2014 CEDEN Water Chemistry Data
- 2013 CEDEN Water Chemistry Data
- 2012 CEDEN Water Chemistry Data
- 2011 CEDEN Water Chemistry Data
- 2010 CEDEN Water Chemistry Data
- 2009 CEDEN Water Chemistry Data
- 2008 CEDEN Water Chemistry Data
- 2007 CEDEN Water Chemistry Data
- 2006 CEDEN Water Chemistry Data
- 2005 CEDEN Water Chemistry Data
- 2004 CEDEN Water Chemistry Data
- 2003 CEDEN Water Chemistry Data
- 2002 CEDEN Water Chemistry Data
- 2001 CEDEN Water Chemistry Data
- 2000 CEDEN Water Chemistry Data
- CEDEN Water Chemistry Data Prior to 2000
CKAN Data API
Access resource data through the CKAN DataStore API. The examples below use this resource's ID.
Endpoints
The Data API provides these actions. Creating or updating records requires appropriate permissions; the query actions read public DataStore records.
| Create | https://ckan.cdt.dev.datopian.com/api/3/action/datastore_create |
|---|---|
| Update / insert | https://ckan.cdt.dev.datopian.com/api/3/action/datastore_upsert |
| Query | https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search |
| Query via SQL | https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search_sql |
Query examples
"https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search?resource_id=f4aa224d-4a59-403d-aad8-187955aa2e38&limit=5""https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search?resource_id=f4aa224d-4a59-403d-aad8-187955aa2e38&q=jones""https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search_sql?sql=SELECT%20%2A%20FROM%20%22f4aa224d-4a59-403d-aad8-187955aa2e38%22%20LIMIT%205"SQL queries depend on whether SQL search is enabled by the portal.
OData query
Use the resource's OData URL and its field names for paging, selecting columns, or filtering rows.
ODATA_RESOURCE_URL?$top=5
ODATA_RESOURCE_URL?$skip=5&$top=5
ODATA_RESOURCE_URL?$select=FIELD_NAME&$filter=FIELD_NAME eq 'VALUE'Replace ODATA_RESOURCE_URL, FIELD_NAME, and VALUE with the details for the selected resource. See the OData query options guide (opens in a new tab) for more examples.
Use the API in code
JavaScript (JSONP)
var data = { resource_id: 'f4aa224d-4a59-403d-aad8-187955aa2e38', limit: 5, q: 'jones' };
$.ajax({
url: 'https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search',
data: data,
dataType: 'jsonp',
success: function (response) {
console.log(response.result.total, response.result.records);
}
});Python
import json
from urllib.request import urlopen
url = 'https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search?resource_id=f4aa224d-4a59-403d-aad8-187955aa2e38&limit=5'
with urlopen(url) as response:
result = json.load(response)['result']
print(result['total'], result['records'])For parameters and response fields, see the CKAN DataStore documentation (opens in a new tab).