Walnut Grove MHP
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
- 51 people
- Connections
- 17
- Water source
- Groundwater
- Based in
- Dahlgren, VA
- County
- King George
- Owner
- Private
The short answer
Nothing in EPA’s and CDC’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. 4 health-based violations since 2016.
What was found
Arsenic: Virginia’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2023.
Fluoride, chromium (total) and nitrate: EPA’s compliance monitoring file, samples taken from April 24, 2012 to April 10, 2019. Newer results are in the utility’s annual water quality report.
Below EPA’s limits1
Fluoride
Forms or is added in treatment
0.22ppm
Highest yearly average, 2014 to 2017
2017: not found
Averaged by year, the highest was 0.22 ppm, in 2014, below EPA’s legal limit of 4.0 ppm. In 2017, the latest year on file, it wasn’t found in its one sample.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Arsenic
- Chromium (total)
- Lead
- Nitrate
Violations since 2016
| Contaminant or rule | Type | Period | Measured | Status |
|---|---|---|---|---|
| Lead and Copper Rule | Required information about lead was not given to customers.EPA: Public Education | Dec. 1, 2024 | — | Resolved |
| Groundwater Rule | A significant problem found in a state inspection was not fixed on time.EPA: Failure To Address Deficiency | July 22, 2024 | — | Resolved |
| Revised Total Coliform Rule | E. coli was confirmed in the water system.EPA: Maximum Contaminant Level Violation, E. coli (RTCR) | Aug. 1, 2022 to Aug. 31, 2022 | — | Resolved |
| Revised Total Coliform Rule | Coliform results required a check of the system, and the check or its fixes were not done on time.EPA: Treatment Technique, Level 1 Assessment (RTCR) | July 27, 2019 | — | Resolved |
| Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 26 monitoring or reporting violations not shown. | ||||
What this report can’t tell you
Everything else. Arsenic results here are Virginia’s yearly averages as CDC publishes them, from 2023 on, with EPA’s national file for 2012 to 2019. Fluoride, chromium (total) and nitrate come from EPA’s file alone, which ends in 2019. Walnut Grove MHP’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 2023; EPA’s compliance samples are from April 24, 2012 to April 10, 2019.
Testing your own tap
No lab Virginia certifies is within 75 miles of the area Walnut Grove MHP serves on the state’s list. Some take samples by mail; the state’s page lists them all.
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 VirginiaSources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- CDC Environmental Public Health Tracking Network, yearly averages Virginia supplied to CDC, 2021 to 2023, read Oct. 8, 2026. TapBuff’s comparisons with EPA’s limits are its own, not CDC’s or Virginia’s.
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID VA6099590. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Nothing here is above a health goalIn EPA’s and CDC’s records for this utility. They don’t cover everything, which is why the next step matters.Every contaminant TapBuff tracks
- Get the utility’s own reportWalnut Grove MHP must send you a water quality report every year. It covers contaminants this page does not show, and has newer results than EPA’s national file for the ones here that come from it.How to read it
- Test your own tap for leadYour service line, solder and fixtures decide the lead at your faucet, not the utility’s average.Lead in your water: what to do
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded