City of San Diego

Published drinking-water records and contacts for City of San Diego. System CA3710020. Review sources and dates; not a real-time water assessment.

System ID: CA3710020
State or territory: CA
Published population served: 1385379
System type (source code): CWS

Published records and dates

PFAS / lithium (EPA UCMR 5): 480 — 2023-01-25 – 2023-12-07
Lead and copper monitoring summaries: 46 — 1992-01-01 – 2026-12-31
California DDW laboratory results: 4569 — 2026-01-01 – 2026-06-30

Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.

Read the provider’s annual water quality report

Report link listed: 2026-10-05. This is not the report’s sampling date.

Published testing results

Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.

“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example

EPA UCMR 5 — most recent imported sample per substance
Substance	Published result	Reporting limit	Sample date	Sampling location
11Cl-PF3OUdS	< 0.005 µg/L	0.005 µg/L	2023-10-18	Alvarado WTP / 87SYS
4:2 FTS	< 0.003 µg/L	0.003 µg/L	2023-10-18	Alvarado WTP / 87SYS
6:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
8:2 FTS	< 0.005 µg/L	0.005 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
9Cl-PF3ONS	< 0.002 µg/L	0.002 µg/L	2023-10-18	Otay WTP / 95SYS
ADONA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
HFPO-DA	< 0.005 µg/L	0.005 µg/L	2023-10-18	Alvarado WTP / 87SYS
NEtFOSAA	< 0.005 µg/L	0.005 µg/L	2023-12-07	Otay WTP / 95SYS
NFDHA	< 0.02 µg/L	0.02 µg/L	2023-10-18	Miramar WTP / 3SYS
NMeFOSAA	< 0.006 µg/L	0.006 µg/L	2023-12-07	Otay WTP / 95SYS
PFBA	< 0.005 µg/L	0.005 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
PFBS	< 0.003 µg/L	0.003 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
PFDA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Miramar WTP / 3SYS
PFDoA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Alvarado WTP / 87SYS
PFEESA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Miramar WTP / 3SYS
PFHpA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Miramar WTP / 3SYS
PFHpS	< 0.003 µg/L	0.003 µg/L	2023-10-18	Alvarado WTP / 87SYS
PFHxA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Miramar WTP / 3SYS
PFHxS	< 0.003 µg/L	0.003 µg/L	2023-10-18	Alvarado WTP / 87SYS
PFMBA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
PFMPA	< 0.004 µg/L	0.004 µg/L	2023-10-18	Miramar WTP / 3SYS
PFNA	< 0.004 µg/L	0.004 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
PFOA	< 0.004 µg/L	0.004 µg/L	2023-10-18	Alvarado WTP / 87SYS
PFOS	< 0.004 µg/L	0.004 µg/L	2023-10-18	Miramar WTP / 3SYS
PFPeA	< 0.003 µg/L	0.003 µg/L	2023-10-18	Purchased water representative sample site / 182SYS
PFPeS	< 0.004 µg/L	0.004 µg/L	2023-10-18	Miramar WTP / 3SYS
PFTA	< 0.008 µg/L	0.008 µg/L	2023-12-07	Otay WTP / 95SYS
PFTrDA	< 0.007 µg/L	0.007 µg/L	2023-12-07	Otay WTP / 95SYS
PFUnA	< 0.002 µg/L	0.002 µg/L	2023-10-18	Otay WTP / 95SYS
lithium	16 µg/L	9 µg/L	2023-10-18	Purchased water representative sample site / 182SYS

Download all EPA UCMR 5 records (CSV)

Lead and copper: 90th-percentile summaries

These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile

Eight most recent imported monitoring summaries
Substance	Monitoring period	Source quarter
Lead (PB90)	2024-01-01 – 2026-12-31	2026Q3
Lead (PB90)	2021-01-01 – 2023-12-31	2026Q3
Lead (PB90)	2018-01-01 – 2020-12-31	2026Q3
Lead (PB90)	2015-01-01 – 2017-12-31	2026Q3
Lead (PB90)	2016-07-01 – 2016-12-31	2026Q3
Lead (PB90)	2014-01-01 – 2016-12-31	2026Q3
Lead (PB90)	2016-01-01 – 2016-06-30	2026Q3
Lead (PB90)	2011-01-01 – 2013-12-31	2026Q3

Twelve most recent imported state laboratory records
Substance	Published result	Sample date	Location / source
NITRATE	< 0.400000000 MG/L	2026-06-30	OTAY PLANT INFLUENT - BLEND / California DDW laboratory results
NITRATE-NITRITE	< 0.400000000 MG/L	2026-06-30	OTAY PLANT EFFLUENT - TREATED / California DDW laboratory results
NITRITE	< 0.400000000 MG/L	2026-06-30	ALVARADO PLANT EFFLUENT - TREATED / California DDW laboratory results
CHLORATE	215 UG/L	2026-06-30	OTAY PLANT EFFLUENT - TREATED / California DDW laboratory results
NITRATE	< 0.400000000 MG/L	2026-06-30	ALVARADO PLANT EFFLUENT - TREATED / California DDW laboratory results
NITRITE	< 0.400000000 MG/L	2026-06-30	MIRAMAR PLANT EFFLUENT - TREATED / California DDW laboratory results
CHLORITE	0.323 MG/L	2026-06-30	OTAY PLANT EFFLUENT - TREATED / California DDW laboratory results
NITRATE-NITRITE	< 0.400000000 MG/L	2026-06-30	ALVARADO PLANT INFLUENT - BLEND / California DDW laboratory results
NITRATE-NITRITE	< 0.400000000 MG/L	2026-06-30	OTAY PLANT INFLUENT - BLEND / California DDW laboratory results
NITRATE	< 0.400000000 MG/L	2026-06-30	OTAY PLANT EFFLUENT - TREATED / California DDW laboratory results
NITRITE	< 0.400000000 MG/L	2026-06-30	OTAY PLANT EFFLUENT - TREATED / California DDW laboratory results
NITRATE-NITRITE	< 0.400000000 MG/L	2026-06-30	MIRAMAR PLANT INFLUENT- BLEND / California DDW laboratory results

State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.

Download state records with source notes (CSV)

Published compliance history

7 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.

Twenty most recent imported compliance records
Rule / record	Period	Recorded status	Health-based (EPA classification)	Source quarter
Revised Total Coliform Rule / Monitoring, Routine (RTCR)	2020-04-01 – 2020-04-30	Resolved	No	2026Q3
Revised Total Coliform Rule / Monitoring, Routine (RTCR)	2020-03-01 – 2020-03-31	Resolved	No	2026Q3
Revised Total Coliform Rule / Monitoring, Routine (RTCR)	2020-02-01 – 2020-02-29	Resolved	No	2026Q3
Revised Total Coliform Rule / Monitoring, Routine (RTCR)	2020-01-01 – 2020-01-31	Resolved	No	2026Q3
Revised Total Coliform Rule / Monitoring, Routine (RTCR)	2019-12-01 – 2019-12-31	Resolved	No	2026Q3
Nitrate Rule / Monitoring, Regular	2017-01-01 – 2017-12-31	Resolved	No	2026Q3
Nitrate Rule / Monitoring, Regular	2017-01-01 – 2017-12-31	Resolved	No	2026Q3

Source dates and refresh checks

A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.

EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
California DDW laboratory results — last successful check: 2026-10-17

Administrative contact (EPA filing)

Kleis, Drew: 858-292-6436

An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.

Official state resources · How to read these records