Tap Water Quality Report
Tap water quality in LAYTON, Utah
Tap water in LAYTON, Utah receives a grade of C (73/100) from TapWaterSafety.org. It's served by LAYTON CITY WATER SYSTEM. The most significant water quality concerns are: Arsenic significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in LAYTON's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving LAYTON.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.7 ppb, 175x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 24.9 ppb, 166x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 8.87 ppb, 148x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for LAYTON CITY WATER SYSTEM (system ID UTAH06018) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for LAYTON
Filters matched to the specific contaminants in LAYTON's water supply.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts like TTHM. Look for NSF/ANSI 53 VOC or chloroform reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in LAYTON's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
0.7 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 175× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
24.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 166× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
8.87 ppb | 0.06 | — | — | — | — | — | 148× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
12.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 124× over |
| Bromodichloromethane Disinfection byproduct |
6.16 ppb | 0.06 | — | — | — | — | — | 103× over |
| Trichloroacetic acid Disinfection byproduct |
7.68 ppb | 0.1 | — | — | — | — | — | 77× over |
| Chloroform Disinfection byproduct |
15.7 ppb | 0.4 | — | — | — | — | — | 39× over |
| Dibromochloromethane Disinfection byproduct |
2.33 ppb | 0.1 | — | — | — | — | — | 23× over |
| Dichloroacetic acid Disinfection byproduct |
4.57 ppb | 0.2 | — | — | — | — | — | 23× over |
| Chromium (hexavalent) Heavy metal |
0.391 ppb | 0.02 | — | — | — | — | — | 20× over |
| Dibromoacetic acid* Disinfection byproduct |
0.267 ppb | 0.03 | — | — | — | — | — | 8.9× over |
| Radium, combined (-226 and -228) Radiological |
0.19 pCi/L | 0.05 | 5.0 | — | — | — | — | 3.9× over |
| Nitrate Inorganic |
0.438 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.1× over |
| Antimony* Heavy metal |
0.7 ppb | 1.0 | 6.0 | 10 | 20 | 1 | — | Below guideline |
| Bromoform Disinfection byproduct |
0.155 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
25.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
43.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| 6:2 Fluorotelomer sulfonate (6 2FTS) * Other |
0.059 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.24 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.868 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
2.27 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Selenium* Heavy metal |
0.35 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Monobromoacetic acid* Disinfection byproduct |
0.0417 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA)* PFAS |
0.273 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.207 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS)* PFAS |
0.059 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Cyanide Inorganic |
3.0 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Fluoride Inorganic |
0.154 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
1.29 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from LAYTON CITY WATER SYSTEM.