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Updated 2026-10-15
County water report

Sacramento County Water Quality: 9 Cities Ranked by the Records

Sacramento County, California: 9 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 Sacramento 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.

Perfluorooctanesulfonic acid (PFOS)Detected in 3 systems of 9 tested4.0 ng/L federal MCL (2024) · US EPAHighest41.4 ng/L
LithiumDetected in 3 systems of 9 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest69 µg/L
Perfluorooctanoic acid (PFOA)Detected in 3 systems of 9 tested4.0 ng/L federal MCL (2024) · US EPAHighest17.3 ng/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 4 systems of 9 tested10 ng/L federal MCL (2024) · US EPAHighest19.1 ng/L
Water hardnessDetected in 1 systemAesthetic, no federal health limit · USGSHighest8.1 gpg
Total trihalomethanes (TTHM)Detected in 1 system80 ppb federal MCL · US EPAHighest63 ppb
Haloacetic acids (HAA5)Detected in 1 system60 ppb federal MCL · US EPAHighest38 ppb
Lead (90th percentile)Detected in 2 systems of 9 tested15 µg/L federal action level · US EPAHighest6 µg/L
5 more contaminants detectedShow
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 9 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest6.2 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 4 systems of 9 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest6.3 ng/L
Perfluorobutanoic acid (PFBA)Detected in 2 systems of 9 testedNo federal or state limit; shown for transparencyHighest9 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 3 systems of 9 testedNo federal or state limit; shown for transparencyHighest4.7 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 3 systems of 9 testedNo federal or state limit; shown for transparencyHighest7.7 ng/L
21 PFAS tested, none detected in any systemShow

Tested in these 9 systems: CAL AM - ANTELOPE, CAL AM - FRUITRIDGE VISTA, CAL AM - PARKWAY, CAL AM - SUBURBAN ROSEMONT, CITY OF SACRAMENTO MAIN, FAIR OAKS WATER DISTRICT, FOLSOM, CITY OF - MAIN, GALT, CITY OF, RIO LINDA/ELVERTA COMMUNITY WATER DIST

  • 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)
9 cities

Cities ranked by the records

Showing 6 of 9 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 Sacramento County3 of 9 city reports had a PFAS sample above a 2024 EPA limit
  1. Sacramento41.4 ng/L
  2. Florin14.7 ng/L
  3. Rosemont13.4 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in California
Lead

0of 9 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

1city reports hardness · Sacramento, 8.1 gpg

Hard on the USGS scale. An aesthetic measure with no federal health limit.

Hard water explained
Who supplies the county

Largest water systems

  1. SacramentoCITY OF SACRAMENTO MAIN · CA3410020
    527,979 served
  2. FolsomFOLSOM, CITY OF - MAIN · CA3410014
    80,969 served
  3. RosemontCAL AM - SUBURBAN ROSEMONT · CA3410010
    54,893 served
  4. FlorinCAL AM - PARKWAY · CA3410017
    50,646 served
  5. Fair OaksFAIR OAKS WATER DISTRICT · CA3410009
    36,226 served
  6. AntelopeCAL AM - ANTELOPE · CA3410031
    35,617 served
  7. GaltGALT, CITY OF · CA3410011
    26,536 served
  8. ParkwayCAL AM - FRUITRIDGE VISTA · CA3410023
    16,075 served
  9. Rio LindaRIO LINDA/ELVERTA COMMUNITY WATER DIST · CA3410018
    15,460 served
Questions

Frequently asked

How does Sacramento County tap water compare across cities?

PurityMap ranks 9 cities in Sacramento 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 Folsom's main water system: FOLSOM, CITY OF - MAIN · PWSID CA3410014 · 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 Sacramento County cities had a PFAS sample above a 2024 EPA limit?

3 of 9 Sacramento County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Sacramento (PFOS 41.4 ng/L), Florin (PFOS 14.7 ng/L), Rosemont (PFOS 13.4 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 Sacramento County tap water?

Utilities report lead as a 90th-percentile result from home taps. 2 of 9 Sacramento 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.

Does Sacramento County have hard water?

Hardness is published in utility water-quality reports for 1 Sacramento County city on record; the hardest is Sacramento at 8.1 grains per gallon. Hardness affects scale and appliances; it is not a health finding.

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