Water Quality Report · Updated October 07, 2026
JCSA - CENTRAL SYSTEM
JCSA - CENTRAL SYSTEM delivers tap water graded B (84/100) by TapWaterSafety.org. The utility serves approximately 57,726 residents in WILLIAMSBURG, Virginia using groundwater. 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.
Is WILLIAMSBURG tap water safe to drink?
JCSA - CENTRAL SYSTEM delivers tap water that earns a grade of B (84/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 57,726 residents in WILLIAMSBURG, drawing from groundwater.
Public testing data identifies 11 contaminants in this water above EWG's health-based guidelines, including: Total trihalomethanes (TTHMs), Dibromoacetic acid, Haloacetic acids (HAA9), Dibromochloromethane, Bromodichloromethane, Haloacetic acids (HAA5), Bromoform, Radium, combined (-226 and -228), Chloroform, Chlorate, Dichloroacetic acid. 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 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.
Quick actions for WILLIAMSBURG residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for JCSA - CENTRAL SYSTEM.
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.
Contact JCSA - CENTRAL SYSTEM
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 WILLIAMSBURG
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 84/100 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 |
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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
JCSA - CENTRAL SYSTEM service area
This water system serves 1 community in James City County, Virginia. Click any city for its dedicated tap water quality page.
Find the right filter for WILLIAMSBURG water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.