PFOA
Not detected above reporting limit
- Sample date
- Reporting limit
- 0.004 µg/L
- Sample ID
- W1609597
California
Water in San Diego, CA
San Diego County, California · City overview · Page updated 2026-10-20
PFAS testing · samples through 2023-12-07
Limited coverage
Water summary
Where San Diego gets its water
City of San Diego Public Utilities is the likely provider for the mapped location in San Diego. Check your utility bill to confirm service at your address. The sources below describe the supply network; they do not establish water quality at your tap.
- Likely water system
- City of San Diego Public Utilities →
- Water sources
- San Diego County Water Authority
- Watershed
- San Diego
Public drinking-water record
Drinking water in San Diego
City of San Diego Public Utilities is listed for this area. Check your utility bill to confirm who supplies your home. These are public water-system records, not a test of the tap water at your home.
PFAS testing in San Diego’s drinking water
No PFAS detection above the reporting limit in these results. Most recent PFAS sample shown here: .
PFOS
Not detected above reporting limit
- Sample date
- Reporting limit
- 0.004 µg/L
- Sample ID
- W1609602
Selected latest compound samples from the published federal system record. Multiple sample points may share a date. A detection does not establish a violation. A non-detection does not mean PFAS-free. PFOA and PFOS limits and regulatory context are separate from these historical samples.
Lead and copper
Lead: 0 mg/L, period ending 2023-12-31. These are system 90th-percentile results, not individual household concentrations.
EPA UCMR5 source and sampling program · EPA ECHO compliance and lead/copper records · Testing and source records for City of San Diego Public Utilities
U.S. Drought Monitor ·
Drought around this place
This is the latest drought map in this publication, effective 2026-10-13; it is not a live report.
San Diego County, California: 0% of county area in D1 or worse; 65.47% in D0 or worse. D0 means abnormally dry. On 2026-10-06, D1 or worse covered 0%.
County area shares at or above each severity: D2 0% · D3 0% · D4 0%. These cumulative percentages overlap and must not be added. County conditions do not describe every point in a city or a drinking-water restriction.
California drought and water context
Open the drought map and historical playback · U.S. Drought Monitor source
Loading the local water map…
Drought, streams, rainfall & wells
Latest water conditions
Read each measure with its date. Rainfall, streams and groundwater can change at different rates.
Drought
Abnormally dryAbnormally dry
Abnormally dry affects part of the county; this is county context, not an exact city boundary.
Older report · 2026-10-13U.S. Drought Monitor
Published or effective 2026-10-13. Water Around last checked 2026-10-20T12:00:15.835637+00:00. This report may not describe conditions today.
Streamflow
Much above seasonal rangeMuch above seasonal range
Flow at this gauge was much higher than usual for this time of year. Check the measurement date shown.
Older report · 2026-10-19USGS daily mean discharge
Published or effective 2026-10-19. Water Around last checked 2026-10-20T11:59:36.282Z. This report may not describe conditions today.
Recent rainfall
1.059 inches in 30 days1.059 inches in 30 days
278% above the 1991–2020 station normal for this period.
Older report · 2026-10-17NOAA station observations
Published or effective 2026-10-17. Water Around last checked 2026-10-20T11:59:42.237Z. This report may not describe conditions today.
Groundwater
Method developingMonitoring is available
Measurements are available at nearby wells. An overall groundwater condition is not calculated from them.
5 nearby monitoring wellsYour public water system
City of San Diego Public Utilities
The mapped location falls within this system’s EPA service area. Confirm service to your home with the utility.
City of San Diego Public Utilities →CA3710020 · community
Local compliance cacheA local summary of reported violations is not available here. When federal records are available, you can read them in the drinking-water section above. Neither source is a live test of water at your tap.
Your watershed
San Diego Bay
A watershed is the land area where rain and streams drain toward a shared outlet. It helps explain natural water conditions, but it may not match the area supplying your tap.
- Local watershed
- San Diego Bay
- Broader basin
- San Diego
Below ground
Groundwater near San Diego
Aquifers can supply water; monitoring wells measure water levels at individual sites. One well does not describe an entire aquifer or your household well.
Groundwater sources
No aquifer source identified
The supply records do not name an aquifer. Groundwater may still be present.
Nearby monitoring
5 nearby monitoring wells
Detailed well pages are not available for these nearby sites yet.
Reading well data
What well measurements can tell you
A well’s water level does not tell us how much water an aquifer holds. Pumping totals alone do not show depletion, and a surface map does not show the aquifer’s full underground extent. To understand water quality in a private well, use tests from that well and local guidance.
California water planning
Water planning in San Diego
Explore San Diego’s plans for imported water, local storage, conservation and additional supply sources.
Partial records
Supply
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Urban supply
- Reporting period
- Plan cycle
Partial records
Demand
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Urban demand
- Reporting period
- Plan cycle
Partial records
Future demand
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Projected demand
- Reporting period
- Plan cycle
State records
Groundwater
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Groundwater
- Reporting period
- Plan cycle
Partial records
Reservoirs
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Reservoir
- Reporting period
- Observation
Partial records
Snowpack
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Snowpack
- Reporting period
- Observation
State records
Water planning
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Utility and groundwater plan
- Reporting period
- Plan cycle
Partial records
Imported water
About these records
These details come from official state plans and reports. A planning estimate describes what may be needed or supplied, not what was measured today.
- Measure
- Imported water
- Reporting period
- Plan cycle
Water planning regions
South Coast hydrologic regionHydrologic regionSources and limitations
These overview cards explain water management and planning; they do not reproduce each provider’s Urban Water Management Plan tables. State Water Project, Central Valley Project, Colorado River, local water and groundwater sources are shown separately.
- California Department of Water Resources: SGMA Portal and Basin PrioritizationBasin priority and plan status are governance indicators, not groundwater-level observations.
- California Department of Water Resources: Urban Water Management PlansPlanning scenarios and reliability assessments are utility-specific.
- California Department of Water Resources: California Water Data and reservoir/snow contextReservoir percent full and snowpack percent of average are different metrics.
Detailed testing and assessment records are not available here yet.We do not have enough information to show here yet. That does not tell us whether the water is in good or poor condition.
Waters around you
Rivers and lakes near San Diego
Nearby rivers and lakes from USGS maps. Proximity does not establish a drinking-water source, public access or shared water conditions.
We have no named river or lake to show in this area yet.
Smaller streams may still be present. This catalog does not include every waterbody.
Water sources
Where San Diego's water comes from
City of San Diego Public Utilities receives water from San Diego County Water Authority, according to the source records.
The links show sources and suppliers, not the amount being delivered today. Select one for its source record.
Sources traced upstreamSource coverage does not measure water quality or reliability.
Your water system
Who supplies it
Sources and suppliers
How it reaches the region
How it reaches the region
Sources and relationships as a list
Documented current sources or suppliers for City of San Diego Public Utilities include San Diego County Water Authority. A relationship does not by itself establish the current delivered amount.
- City of San Diego Public Utilities purchases from San Diego County Water Authority. Current. The relationship is documented; a current delivered amount is not available.
- San Diego County Water Authority supplied by Claude “Bud” Lewis Carlsbad Desalination Plant supply. Current. The relationship is documented; a current delivered amount is not available.
- San Diego County Water Authority purchases from Metropolitan Water District of Southern California. Current. The relationship is documented; a current delivered amount is not available.
- San Diego County Water Authority imports from Colorado River. Current. The relationship is documented; a current delivered amount is not available.
- Metropolitan Water District of Southern California supplied by California Aqueduct. Current. The relationship is documented; a current delivered amount is not available.
- Metropolitan Water District of Southern California supplied by Colorado River Aqueduct. Current. The relationship is documented; a current delivered amount is not available.
- California Aqueduct supplied by California State Water Project. Current. The relationship is documented; a current delivered amount is not available.
- Colorado River Aqueduct imports from Colorado River. Current. The relationship is documented; a current delivered amount is not available.
Water source types explained
Surface waterWater drawn from rivers, lakes, or reservoirs.
GroundwaterWater pumped from aquifers—bodies of rock or sediment that store and transmit groundwater, not underground lakes.
Wholesale waterA regional supplier can supply your local provider without serving your household directly.
Imported waterYour drinking-water source basin can differ from the watershed where you live.