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

Davis County Water Quality: 9 Cities Ranked by the Records

Davis County, Utah: 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 Davis 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 9 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest54.2 µg/L
Lead (90th percentile)Detected in 9 systems15 µg/L federal action level · US EPAHighest16 µg/L
Copper (90th percentile)Detected in 1 system1.3 mg/L federal action level · US EPAHighest1.37 mg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 4 systems of 9 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest4.3 ng/L
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)Detected in 1 system of 9 testedNo federal or state limit; shown for transparencyHighest30 ng/L
Perfluorobutanoic acid (PFBA)Detected in 1 system of 9 testedNo federal or state limit; shown for transparencyHighest7.4 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 9 testedNo federal or state limit; shown for transparencyHighest3 ng/L
25 PFAS tested, none detected in any systemShow

Tested in these 9 systems: BOUNTIFUL CITY WATER SYSTEM, CENTERVILLE CITY WATER SYSTEM, CLEARFIELD CITY WATER SYSTEM, FARMINGTON CITY WATER SYSTEM, KAYSVILLE CITY WATER SYSTEM, LAYTON CITY WATER SYSTEM, NORTH SALT LAKE CITY WATER SYSTEM, SYRACUSE CITY WATER SYSTEM, WOODS CROSS CITY WATER SYSTEM

  • 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)
  • 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)
  • Perfluoroheptanoic acid (PFHpA)
  • Perfluorohexanesulfonic acid (PFHxS)
  • Perfluorohexanoic acid (PFHxA)
  • Perfluorononanoic acid (PFNA)
  • Perfluorooctanesulfonic acid (PFOS)
  • Perfluorooctanoic acid (PFOA)
  • 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 Davis CountyPFAS detected in 5 of 9 cities; none had a sample above a 2024 EPA limit
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Utah
Lead

1of 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 Utah
Who supplies the county

Largest water systems

  1. LaytonLAYTON CITY WATER SYSTEM · UTAH06018
    82,000 served
  2. BountifulBOUNTIFUL CITY WATER SYSTEM · UTAH06015
    37,500 served
  3. SyracuseSYRACUSE CITY WATER SYSTEM · UTAH06012
    35,561 served
  4. ClearfieldCLEARFIELD CITY WATER SYSTEM · UTAH06002
    33,540 served
  5. KaysvilleKAYSVILLE CITY WATER SYSTEM · UTAH06006
    32,976 served
  6. FarmingtonFARMINGTON CITY WATER SYSTEM · UTAH06004
    27,860 served
  7. North Salt LakeNORTH SALT LAKE CITY WATER SYSTEM · UTAH06019
    18,655 served
  8. CentervilleCENTERVILLE CITY WATER SYSTEM · UTAH06001
    17,155 served
  9. Woods CrossWOODS CROSS CITY WATER SYSTEM · UTAH06021
    13,110 served
Questions

Frequently asked

How does Davis County tap water compare across cities?

PurityMap ranks 9 cities in Davis 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 Syracuse's main water system: SYRACUSE CITY WATER SYSTEM · PWSID UTAH06012 · Purity Score 97 (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 Davis County cities had a PFAS sample above a 2024 EPA limit?

None of the 9 Davis County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 5.

Is there lead in Davis County tap water?

Utilities report lead as a 90th-percentile result from home taps. 9 of 9 Davis County cities reported a value above zero, and 1 city 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 Davis County water systems had drinking-water violations?

1 city in Davis 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.

Next step

Follow Davis 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 lead
FOLLOW THIS COUNTY

Record changes only

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

Follow Davis County's water →