Water Quality Report · Updated October 07, 2026
NORTHERN KENTUCKY WATER DISTRICT
NORTHERN KENTUCKY WATER DISTRICT delivers tap water graded A (87/100) by TapWaterSafety.org. The utility serves approximately 259,949 residents in FT. THOMAS, Kentucky using surface water. The most significant water quality concerns are: Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. For questions, the utility can be reached at 859-991-1655.
Is FT. THOMAS tap water safe to drink?
NORTHERN KENTUCKY WATER DISTRICT delivers tap water that earns a grade of A (87/100) from TapWaterSafety.org — an excellent rating reflecting minimal contamination and full compliance with health guidelines.
The utility serves 259,949 residents in FT. THOMAS, drawing from surface water.
Public testing data identifies 7 contaminants in this water above EWG's health-based guidelines, including: Total trihalomethanes (TTHMs), Haloacetic acids (HAA9), Haloacetic acids (HAA5), Nitrate, Nitrate and nitrite, Chromium (hexavalent), Chlorate. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for NORTHERN KENTUCKY WATER DISTRICT (system ID KY0590220) 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.
Quick actions for FT. THOMAS residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for NORTHERN KENTUCKY WATER DISTRICT.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 30.3 ppb, 202x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 9.78 ppb, 163x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 7.56 ppb, 76x above the EWG health guideline of 0.1 ppb.
Contact NORTHERN KENTUCKY WATER DISTRICT
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for FT. THOMAS
Filters matched to the specific contaminants in this water supply.
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.
Score breakdown
This utility's overall score of 87/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 |
|---|---|---|---|---|---|---|---|---|
| Total trihalomethanes (TTHMs) Disinfection byproduct |
30.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 202× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
9.78 ppb | 0.06 | — | — | — | — | — | 163× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
7.56 ppb | 0.1 | 60.0 | 60 | — | — | — | 76× over |
| Nitrate Inorganic |
0.665 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.7× over |
| Nitrate and nitrite Inorganic |
0.665 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.7× over |
| Chromium (hexavalent) Heavy metal |
0.0857 ppb | 0.02 | — | — | — | — | — | 4.3× over |
| Chlorate Disinfection byproduct |
272.9 ppb | 210.0 | — | — | — | — | — | 1.3× over |
| 1,4-Dioxane Semi-volatile organic compound |
0.292 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Bromochloromethane Other |
0.009 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) Other |
1.26 ppt | 9.0 | 10.0 | — | — | — | — | Below guideline |
| Molybdenum Other |
1.54 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
25.4 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Aluminum Heavy metal |
12.7 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Vanadium Other |
0.236 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.582 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 2,4-D Pesticide/Herbicide |
0.052 ppb | 20.0 | 70.0 | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.883 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.23 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.783 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
NORTHERN KENTUCKY WATER DISTRICT service area
This water system serves 1 community in Kenton County, Kentucky. Click any city for its dedicated tap water quality page.
Find the right filter for FT. THOMAS water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.