Search city, ZIP, contaminant⌘KFind my water
Updated 2026-10-15
County water report

San Diego County Water Quality: 16 Cities Ranked by the Records

San Diego County, California: 16 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in San Diego County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

LithiumDetected in 16 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest65.5 µg/L
Perfluorooctanoic acid (PFOA)Detected in 1 system of 16 tested4.0 ng/L federal MCL (2024) · US EPAHighest11.4 ng/L
  • SWEETWATER AUTHORITY11.4 ng/LSample date: 2024-10-23 to 2025-07-17
  • CAL-AM WATER CORONADONot detected · below 4.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CAMP PENDLETON (SOUTH)Not detected · below 4.0 ng/L lab reporting limitSample date: 2024-02-14 to 2024-08-21
  • CITY OF SAN CLEMENTENot detected · below 4.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • PADRE DAM MWDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-02-16 to 2023-11-15
  • POWAY, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • SANTA FE I.D.Not detected · below 4.0 ng/L lab reporting limitSample date: 2023-10-10 to 2024-07-09
  • VALLECITOS WDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 16 tested4.0 ng/L federal MCL (2024) · US EPAHighest5.7 ng/L
  • SWEETWATER AUTHORITY5.7 ng/LSample date: 2024-10-23 to 2025-07-17
  • CAL-AM WATER CORONADONot detected · below 4.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CAMP PENDLETON (SOUTH)Not detected · below 4.0 ng/L lab reporting limitSample date: 2024-02-14 to 2024-08-21
  • CITY OF SAN CLEMENTENot detected · below 4.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • PADRE DAM MWDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-02-16 to 2023-11-15
  • POWAY, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • SANTA FE I.D.Not detected · below 4.0 ng/L lab reporting limitSample date: 2023-10-10 to 2024-07-09
  • VALLECITOS WDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 4.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
Water hardnessDetected in 5 systemsAesthetic, no federal health limit · USGSHighest12.9 gpg
Perfluorohexanesulfonic acid (PFHxS)Detected in 2 systems of 16 tested10 ng/L federal MCL (2024) · US EPAHighest9.4 ng/L
  • SWEETWATER AUTHORITY9.4 ng/LSample date: 2024-10-23 to 2025-07-17
  • CAMP PENDLETON (SOUTH)5.4 ng/LSample date: 2024-02-14 to 2024-08-21
  • CAL-AM WATER CORONADONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CITY OF SAN CLEMENTENot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • PADRE DAM MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-16 to 2023-11-15
  • POWAY, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • SANTA FE I.D.Not detected · below 3.0 ng/L lab reporting limitSample date: 2023-10-10 to 2024-07-09
  • VALLECITOS WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
Lead (90th percentile)Detected in 8 systems of 16 tested15 µg/L federal action level · US EPAHighest4 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 16 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest11 ng/L
  • SWEETWATER AUTHORITY11 ng/LSample date: 2024-10-23 to 2025-07-17
  • CAMP PENDLETON (SOUTH)3.2 ng/LSample date: 2024-02-14 to 2024-08-21
  • CAL-AM WATER CORONADONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CITY OF SAN CLEMENTENot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • PADRE DAM MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-16 to 2023-11-15
  • POWAY, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • SANTA FE I.D.Not detected · below 3.0 ng/L lab reporting limitSample date: 2023-10-10 to 2024-07-09
  • VALLECITOS WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
Perfluorohexanoic acid (PFHxA)Detected in 2 systems of 16 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest8.6 ng/L
  • SWEETWATER AUTHORITY8.6 ng/LSample date: 2024-10-23 to 2025-07-17
  • SANTA FE I.D.4.5 ng/LSample date: 2023-10-10 to 2024-07-09
  • CAL-AM WATER CORONADONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CAMP PENDLETON (SOUTH)Not detected · below 3.0 ng/L lab reporting limitSample date: 2024-02-14 to 2024-08-21
  • CITY OF SAN CLEMENTENot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • PADRE DAM MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-16 to 2023-11-15
  • POWAY, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • VALLECITOS WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
3 more contaminants detectedShow
Perfluorobutanoic acid (PFBA)Detected in 2 systems of 16 testedNo federal or state limit; shown for transparencyHighest12.3 ng/L
  • SWEETWATER AUTHORITY12.3 ng/LSample date: 2024-10-23 to 2025-07-17
  • PADRE DAM MWD5.8 ng/LSample date: 2023-02-16 to 2023-11-15
  • CAL-AM WATER CORONADONot detected · below 5.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CAMP PENDLETON (SOUTH)Not detected · below 5.0 ng/L lab reporting limitSample date: 2024-02-14 to 2024-08-21
  • CITY OF SAN CLEMENTENot detected · below 5.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 5.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • POWAY, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • SANTA FE I.D.Not detected · below 5.0 ng/L lab reporting limitSample date: 2023-10-10 to 2024-07-09
  • VALLECITOS WDNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 16 testedNo federal or state limit; shown for transparencyHighest4.7 ng/L
  • SWEETWATER AUTHORITY4.7 ng/LSample date: 2024-10-23 to 2025-07-17
  • CAL-AM WATER CORONADONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CAMP PENDLETON (SOUTH)Not detected · below 3.0 ng/L lab reporting limitSample date: 2024-02-14 to 2024-08-21
  • CITY OF SAN CLEMENTENot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • PADRE DAM MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-16 to 2023-11-15
  • POWAY, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • SANTA FE I.D.Not detected · below 3.0 ng/L lab reporting limitSample date: 2023-10-10 to 2024-07-09
  • VALLECITOS WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 16 testedNo federal or state limit; shown for transparencyHighest7.6 ng/L
  • SWEETWATER AUTHORITY7.6 ng/LSample date: 2024-10-23 to 2025-07-17
  • SANTA FE I.D.4.3 ng/LSample date: 2023-10-10 to 2024-07-09
  • CAL-AM WATER CORONADONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-02 to 2023-12-05
  • CAMP PENDLETON (SOUTH)Not detected · below 3.0 ng/L lab reporting limitSample date: 2024-02-14 to 2024-08-21
  • CITY OF SAN CLEMENTENot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-30 to 2024-10-09
  • ESCONDIDO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-06-05 to 2023-08-09
  • FALLBROOK PUDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-28 to 2024-08-05
  • HELIX WATER DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-01-17 to 2024-10-07
  • OCEANSIDE, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-03-13 to 2025-01-14
  • PADRE DAM MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-16 to 2023-11-15
  • POWAY, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-11-11 to 2025-08-05
  • RAMONA MUNICIPAL WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-04-19 to 2024-01-17
  • SAN DIEGO, CITY OFNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-01-25 to 2023-10-18
  • VALLECITOS WDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-02-07 to 2024-06-04
  • VALLEY CENTER MWDNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-11-20 to 2025-12-22
  • VISTA IRRIGATION DISTRICTNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-06
21 PFAS tested, none detected in any systemShow

Tested in these 16 systems: CAL-AM WATER CORONADO, CAMP PENDLETON (SOUTH), CITY OF SAN CLEMENTE, ESCONDIDO, CITY OF, FALLBROOK PUD, HELIX WATER DISTRICT, OCEANSIDE, CITY OF, PADRE DAM MWD, POWAY, CITY OF, RAMONA MUNICIPAL WD, SAN DIEGO, CITY OF, SANTA FE I.D., SWEETWATER AUTHORITY, VALLECITOS WD, VALLEY CENTER MWD, VISTA IRRIGATION DISTRICT

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorononanoic acid (PFNA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
16 cities

Cities ranked by the records

Showing 6 of 16 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in San Diego County1 of 16 city reports had a PFAS sample above a 2024 EPA limit
  1. National City5.7 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in California
Lead

0of 16 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in California
Hard water

5cities report hardness · hardest San Diego, 12.9 gpg

5 of 5 are hard on the USGS scale. An aesthetic measure with no federal health limit.

Hard water explained
Who supplies the county

Largest water systems

  1. San DiegoSAN DIEGO, CITY OF · CA3710020
    1,408,937 served
  2. El CajonHELIX WATER DISTRICT · CA3710010
    277,918 served
  3. National CitySWEETWATER AUTHORITY · CA3710025
    184,915 served
  4. OceansideOCEANSIDE, CITY OF · CA3710014
    174,340 served
  5. EscondidoESCONDIDO, CITY OF · CA3710006
    137,044 served
  6. VistaVISTA IRRIGATION DISTRICT · CA3710027
    134,501 served
  7. San MarcosVALLECITOS WD · CA3710002
    114,700 served
  8. Imperial BeachCAL-AM WATER CORONADO · CA3710001
    106,000 served
  9. SanteePADRE DAM MWD · CA3710037
    93,980 served
  10. San ClementeCITY OF SAN CLEMENTE · CA3010036
    51,545 served
Questions

Frequently asked

How does San Diego County tap water compare across cities?

PurityMap ranks 16 cities in San Diego County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is San Diego's main water system: SAN DIEGO, CITY OF · PWSID CA3710020 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many San Diego County cities had a PFAS sample above a 2024 EPA limit?

1 of 16 San Diego County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including National City (PFOA 11.4 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 4.

Is there lead in San Diego County tap water?

Utilities report lead as a 90th-percentile result from home taps. 8 of 16 San Diego County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Have San Diego County water systems had drinking-water violations?

1 city in San Diego County has a health-based violation in the federal SDWIS record within about the last ten years. Each city report lists the contaminant, year and whether it was resolved.

Does San Diego County have hard water?

Hardness is published in utility water-quality reports for 5 San Diego County cities on record; the hardest is San Diego at 12.9 grains per gallon. Hardness affects scale and appliances; it is not a health finding.

Next step

Follow San Diego County's water

Get an email when a city record in the county changes. Or go straight to the filters certified for what was found here.

Filters certified for PFAS
FOLLOW THIS COUNTY

Record changes only

We email when places in San Diego County get new results. Unsubscribe any time.

Follow San Diego County's water →