Real Water Loss: Data from Water Loss Audits
This table includes a subset of information related to water loss and water system parameters, as reported by water systems in the water loss audits submitted to the Department. The water audit data are available on the WUE Data Portal or the CNRA Open Data Portal. This table draws from the following fields:
- Reporting start and end dates
- Volume of real water losses, in acre-feet
- Number of service connections
- Length of mains
- Audit status
This table includes data for public water systems owned and operated by urban retail water suppliers. The list of public water systems in this resource is based on the PWSID-DWRID crosswalk resource that is also a part of the Urban Water Use Objectives dataset.
Consistent with Water Code section §10608.34, urban retail water suppliers are required to submit to the Department completed and validated water loss audits. California Code of Regulations section 638.5 identifies annual reporting requirements, which include the system-specific data entered into each field of the AWWA Free Water Audit Software. To submit or update an annual water loss report, please email WaterLoss@water.ca.gov.
Data dictionary
Field definitions supplied by the publishing agency in CKAN.
| Column | Type | Label | Description |
|---|---|---|---|
| ORG_ID | numeric | ORG_ID | — |
| SUPPLIER_NAME | text | SUPPLIER_NAME | — |
| PWSID | text | PWSID | — |
| PWS_NAME | text | PWS_NAME | — |
| REPORTING_START_DATE | date | REPORTING_START_DATE | — |
| REPORTING_END_DATE | date | REPORTING_END_DATE | — |
| WL_REAL_LOSSES_VOL_AF | numeric | WL_REAL_LOSSES_VOL_AF | — |
| SD_NUM_SERVICE_CONN | numeric | SD_NUM_SERVICE_CONN | — |
| SD_LENGTH_MAINS_MILES | numeric | SD_LENGTH_MAINS_MILES | — |
| LATEST_STATUS | text | LATEST_STATUS | — |
| FY_START_DATE | date | FY_START_DATE | — |
| FY_END_DATE | date | FY_END_DATE | — |
Resource details
| Format | CSV |
|---|---|
| Size | 271 KB |
| Rows | 1,703 |
| Last updated | Sep 27, 2026 |
| Part of | Urban Water Use Objectives – Relevant Data |
Other resources in this dataset
- PWSID-DWR ID Crosswalk
- Res-Indoor Budget: SDWIS Residential Population
- Res-Outdoor Budget: Landscape Area Measurement
- Annual Weather Data
- Seasonal Weather Data
- Real Water Loss Budget: System-Specific Standards
- Potable Water Produced by URWS, per Source
- Potable and Non-Potable Water Deliveries for URWS
- Potable Supply and Sold/Exported for URWS
- SB X7-7 Targets for Urban Retail Water Suppliers
- CII Service Connections
- Submissions and Approvals for Variances and Temporary Provisions
- Residential Indoor Variances and Temporary Provisions
- Residential Outdoor Variances and Temporary Provisions
- Emergency and High Total Dissolved Solids (TDS) Variances
- [Archived] PWSID-DWRID Crosswalk
- [Archived] Res-Outdoor Budget: Landscape Area Measurement
- [Archived] Submissions and Approvals for Variances and Temporary Provisions
- [Archived] Residential Indoor Variances and Temporary Provisions
- [Archived] Residential Outdoor Variances and Temporary Provisions
- [Archived] Emergency and High Total Dissolved Solids (TDS) Variances
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=5ba2426e-744a-46e7-8632-961dbeec0112&limit=5""https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search?resource_id=5ba2426e-744a-46e7-8632-961dbeec0112&q=jones""https://ckan.cdt.dev.datopian.com/api/3/action/datastore_search_sql?sql=SELECT%20%2A%20FROM%20%225ba2426e-744a-46e7-8632-961dbeec0112%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: '5ba2426e-744a-46e7-8632-961dbeec0112', 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=5ba2426e-744a-46e7-8632-961dbeec0112&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).