Tap Water Quality Report
Tap water quality in WILLIAMSBURG, Virginia
Tap water in WILLIAMSBURG, Virginia receives a grade of B (84/100) from TapWaterSafety.org. It's served by JCSA - CENTRAL SYSTEM. The most significant water quality concerns are: Total trihalomethanes (TTHMs) significantly above health guideline; Dibromoacetic acid significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in WILLIAMSBURG's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving WILLIAMSBURG.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 21.9 ppb, 146x above the EWG health guideline of 0.15 ppb.
Dibromoacetic acid significantly above health guideline
Moderate concernDibromoacetic acid detected at 1.88 ppb, 63x above the EWG health guideline of 0.03 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 3.05 ppb, 51x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for JCSA - CENTRAL SYSTEM (system ID VA3095490) 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 WILLIAMSBURG
Filters matched to the specific contaminants in WILLIAMSBURG's 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.
All contaminants detected in WILLIAMSBURG'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 |
|---|---|---|---|---|---|---|---|---|
| Total trihalomethanes (TTHMs) Disinfection byproduct |
21.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 146× over |
| Dibromoacetic acid Disinfection byproduct |
1.88 ppb | 0.03 | — | — | — | — | — | 63× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
3.05 ppb | 0.06 | — | — | — | — | — | 51× over |
| Dibromochloromethane Disinfection byproduct |
4.36 ppb | 0.1 | — | — | — | — | — | 44× over |
| Bromodichloromethane Disinfection byproduct |
2.1 ppb | 0.06 | — | — | — | — | — | 35× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
2.18 ppb | 0.1 | 60.0 | 60 | — | — | — | 22× over |
| Bromoform Disinfection byproduct |
3.94 ppb | 0.5 | — | — | — | — | — | 7.9× over |
| Radium, combined (-226 and -228) Radiological |
0.31 pCi/L | 0.05 | 5.0 | — | — | — | — | 6.2× over |
| Chloroform Disinfection byproduct |
1.27 ppb | 0.4 | — | — | — | — | — | 3.2× over |
| Chlorate Disinfection byproduct |
655.0 ppb | 210.0 | — | — | — | — | — | 3.1× over |
| Dichloroacetic acid Disinfection byproduct |
0.3 ppb | 0.2 | — | — | — | — | — | 1.5× over |
| Molybdenum Other |
2.45 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.29 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
1.38 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Strontium Radiological |
0.0916 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.926 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, 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 JCSA - CENTRAL SYSTEM.