What's in Essex County, VA tap water?
Essex County sits about 66 miles from our Arlington base and is served primarily by Tappahannock, Town Of, which provides water to roughly 2,380 people. It draws from the Potomac River watershed. Most of the DC metro area drinks treated Potomac River water. Because that surface water is heavily disinfected to stay safe across a long distribution system, the contaminants that most often exceed EWG's stricter health guidelines here are chlorination byproducts, alongside unregulated contaminants like PFAS and hexavalent chromium.
Find a local installerTown of Tappahannock water quality report, explained
What testing of Town of Tappahannock water shows for Essex County, compared with EWG's health guidelines. Being above a guideline is not a legal violation.
Primary water system (EPA)
Tappahannock, Town Of
Serves about 2,380 people
Contaminants EWG most often flags above its health guidelines for the Potomac River watershed:
Larger areas have more than one water system. Enter your exact zip code below for your utility's own EPA record and EWG report.
Measured by the EPA · Essex County, VA
Essex County, VA tap water is fully legal.
It is also 22× the health standard for lead.
Essex County draws its water from the ground rather than from a river, through a small system serving about 2,375 people. Well water arrives with whatever the rock it sat in put into it, and small systems test less often than large ones.
Groundwater does not carry the chlorination byproducts that dominate river supplies, because it needs far less disinfection. What it carries instead comes out of the rock: arsenic, radium, manganese, and nitrate where there is farming above the aquifer. Boiling concentrates all of them rather than removing them.
Every federal limit that applies here is met. Those limits weigh what removal costs. EWG says its health standards are “based only on protecting health and does not consider technical feasibility or the cost of water treatment”. Here is how far apart the two are.
Harm to the brain and nervous system · EPA limit 10 ppb (action level, lowered from 15 ppb, in force November 2027)
Tappahannock, Town of was not part of the EPA's most recent national PFAS monitoring round, so there is no federal PFAS result for it. Nobody has looked, which is not the same as nothing being there. Lead sampling put the ninetieth percentile at 4.33 ppb — meaning nine in ten homes tested below that, and one in ten above it.
Tappahannock, Town of, on the EPA's record
- Source
- groundwater
- Connections served
- 1,417
- People served
- 2,375
- Violations on file
- 2, none health-based
How this water is treated before it reaches you
Treatment makes water safe to distribute. It is not designed to remove PFAS, and chlorine-based disinfection creates byproducts of its own.
Levels: EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5, 2023–2025) for PFAS, and the Lead and Copper Rule 90th-percentile result for lead and copper — the highest reported for Tappahannock, Town of. Health standards: EWG's published drinking water standards, updated February 2025. Levels vary by sampling point and date, and being above a health standard is not a legal violation.
5 contaminants above EWG's health guidelines
Everything EWG found above its guideline in Essex County's water, from testing in 2018-2023. A level can be under the legal limit and still be listed here: EWG's guidelines are set to protect health, not to be easy to meet.
| Contaminant | In this water | EWG guideline | Times over |
|---|---|---|---|
| Total trihalomethanes (TTHMs) | 3.03 ppb | 0.15 ppb | 20× |
| Bromodichloromethane | 0.329 ppb | 0.06 ppb | 5.5× |
| Haloacetic acids (HAA5) | 0.467 ppb | 0.1 ppb | 4.7× |
| Radium, combined (-226 and -228) | 0.17 pCi/L | 0.05 pCi/L | 3.3× |
| Dichloroacetic acid | 0.467 ppb | 0.2 ppb | 2.3× |
Source: EWG Tap Water Database, Tappahannock, Town Of (VA4057800).
The fix for Essex County water
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Reverse osmosis under your sink, for the contaminants EWG most often flags in the Potomac River watershed.
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Common in U.S. tap water
Essex County water quality FAQ
Is Essex County, VA tap water safe to drink?
Public water in Essex County meets federal EPA legal limits. But "legal" is not the same as "clean": across the Potomac River watershed, independent testing routinely finds contaminants like total trihalomethanes (TTHMs) and haloacetic acids (HAA5) above EWG's stricter health guidelines. Enter your zip code above to see your exact utility's record.
What contaminants are common in Essex County water?
For the Potomac River watershed, the contaminants that most often exceed health guidelines are total trihalomethanes (TTHMs), haloacetic acids (HAA5), hexavalent chromium (chromium-6), PFAS (forever chemicals) and lead (from older service lines). Your specific levels depend on your utility, which you can look up by zip code above.
Does Sanavia install reverse osmosis systems in Essex County?
Yes. Essex County is roughly 66 miles from our Arlington base and inside our service area. A Sanavia Hydra reverse osmosis system installs under your sink and reduces every contaminant class above, and we'll mail you a free water test kit.
Where does Essex County tap water come from?
Essex County's primary public water system is Tappahannock, Town Of, which serves roughly 2,380 people. It sits in the Potomac River watershed, so its water shares that region's contaminant profile. Larger areas may have more than one utility, so enter your exact zip code above for your own system's EPA record.
Is well water in Essex County tested for these contaminants?
No. Private wells are not covered by municipal testing, so the responsibility falls on the homeowner. If your Essex County home is on a well, nitrate and naturally occurring contaminants are worth testing for specifically, and a reverse osmosis system reduces them at the tap. We'll mail you a free water test kit either way.
Contaminants common in the Potomac River watershed
Each of these is a plain-English guide to a contaminant class common in Essex County and the surrounding Potomac River watershed — what it is, the health context, and what actually removes it.
Reverse osmosis in Tappahannock & Essex County, VA
Tappahannock, Town of treats this water to the federal standard, yet the contaminants listed above still exceed EWG’s stricter health guidelines — Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Hexavalent chromium (chromium-6) and 2 more. Most of them either pass straight through treatment or form after the plant, in the pipes between it and the tap, which is why the fix has to be at the tap as well.
Lead is the one nothing upstream can fix. It does not arrive from the treatment plant; it comes off the service line and the household plumbing in between, which is why two houses on the same street test differently. A reverse osmosis membrane sits at the end of that run, after every pipe the water has already passed through.
Fit it yourself
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$1,250 installed in Essex County.
Full testing record for Essex County · Find a local installer
Detailed city water reports
For the largest DC-metro utilities we publish the full measured contaminant table.
Nearby areas we serve
What's in your Essex County tap?
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