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Louisa County Zion Crossroads

What EPA’s and CDC’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
2,903 people
Connections
1,002
Water source
Groundwater
Based in
Louisa, VA
County
Louisa
Owner
Local government
The ZIP code it serves

22942

The short answer

1 result is above the health goal. The worst: Lead, above the health goal. 1 health-based violation since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2009 to 2026.

Arsenic: Virginia’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2022 to 2023.

Nitrate, total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5) and chromium (total): EPA’s compliance monitoring file, samples taken from Sept. 4, 2012 to Aug. 14, 2019. Newer results are in the utility’s annual water quality report.

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

3.1ppb

90th percentile, 2024 to 2026

In the latest period, 9 in 10 homes sampled were at or below 3.1 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Below EPA’s limits4

Nitrate

Comes from the source

Below EPA’s limits

2.3ppm

Highest sample; found in 9 of 22

2019 average: 0.31 ppm

The highest sample, in 2013, was 2.3 ppm, below EPA’s legal limit of 10 ppm. In 2019, the latest year on file, its two samples averaged 0.31 ppm.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

15.1ppb

Highest yearly average, 2013 to 2019

2019, one sample: 12.6 ppb

Averaged by year, the highest was 15.1 ppb, in 2016, below EPA’s legal limit of 80 ppb. Its highest single sample was 15.5 ppb. In 2019, the latest year on file, its one sample was 12.6 ppb.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.43ppm

Highest yearly average, 2012 to 2019

2019, one sample: 0.42 ppm

Averaged by year, the highest was 0.43 ppm, in 2015, below EPA’s legal limit of 4.0 ppm. In 2019, the latest year on file, its one sample was 0.42 ppm.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

4.1ppb

Highest yearly average, 2013 to 2019

2019, one sample: 2.1 ppb

Averaged by year, the highest was 4.1 ppb, in 2013, below EPA’s legal limit of 60 ppb. In 2019, the latest year on file, its one sample was 2.1 ppb.

What handles it

No certification claim covers this compound yet.

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2017 to June 30, 20175.5 PCI/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record.

What this report can’t tell you

  • Everything else. Arsenic results here are Virginia’s yearly averages as CDC publishes them, from 2022 on, with EPA’s national file for 2012 to 2019. Nitrate, total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5) and chromium (total) come from EPA’s file alone, which ends in 2019. Louisa County Zion Crossroads’s own annual report, which it must send you every year, has newer results for those and the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; CDC’s yearly averages for Virginia cover 2022 to 2023; EPA’s compliance samples are from Sept. 4, 2012 to Aug. 14, 2019.

Testing your own tap

Louisa County Zion Crossroads’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Virginia certifies.

The 3 labs Virginia certifies closest to the area Louisa County Zion Crossroads serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Aqua-Air Lab Inc.

    Charlottesville, VA · about 22 miles

    Certified for bacteria

    (434) 295-1716

  • Environmental Systems Service, LTD.- Culpeper

    Culpeper, VA · about 26 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (540) 825-6660

  • Spotsylvania County Laboratory Services

    Fredericksburg, VA · about 42 miles

    Certified for bacteria, nitrate, minerals and other inorganics

Virginia Household Water Quality Program, Virginia Cooperative Extension: Drinking water clinics in about 70 counties a year, run through local Extension offices: pick up a kit, collect the sample on the set day, and drop it off locally. Each kit tests well, spring or cistern water for 28 things, including bacteria, nitrate, lead and arsenic. $70 a kit, with funding to help if you need it. Virginia Household Water Quality Program.

All 145 certified labs for Virginia

Sources

PWSID VA2109990. Rebuilt from EPA data on Oct. 18, 2026.

Also in Louisa County

All Virginia utilities

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