Tap WaterIndex

← Virginia

Tap water quality report

Twin Boulders Subdivision

EPA monitoring tested this supplier for 51 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

51
contaminants tested
13
detected
90
people served
12
health-based violations
Virginia rankingsLead in VirginiaPFAS in Virginia
Water source
Ground water
Ownership
Private
Counties served
Montgomery

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

12
health-based violations
333
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2020-02-01
TT Health-based Resolved 2020-02-01
TT Health-based Resolved 2020-02-01
TT Health-based Resolved 2020-02-01
TT Health-based Resolved 2020-02-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01
TT Health-based Resolved 1999-01-01

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
1380 µg/L 106%
of the EPA limit, in the worst sample — 1300 µg/L
 21/22 SYR4 2012–2019
Lead
7.7 µg/L 51%
of the EPA limit 15 µg/L
 21/22 SYR4 2012–2019
Lead
0.0018 mg/L 12%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2025
Nitrate-Nitrite
6600 µg/L 66%
of the EPA limit 10000 µg/L
 8/8 SYR4 2012–2019
Barium
10.6 µg/L 0.5%
of the EPA limit 2000 µg/L
 3/3 SYR4 2012–2019
Fluoride
130 µg/L 3.3%
of the EPA limit 4000 µg/L
 3/3 SYR4 2012–2018
Nitrate
6050 µg/L 61%
of the EPA limit 10000 µg/L
 2/2 SYR4 2017
Dibromochloromethane
0.2800 µg/L
No EPA limit set
 1/3 SYR4 2013–2018
Gross Alpha, Excl. Radon And U
1.4 pCi/L 9.3%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
Gross Beta Particle Activity
0.1300 pCi/L
No EPA limit set
 1/1 SYR4 2015
Monochloroacetic Acid
1.31 µg/L
No EPA limit set
 1/3 SYR4 2013–2018
TTHM
0.2800 µg/L 0.4%
of the EPA limit 80 µg/L
 1/3 SYR4 2013–2018
Total Haloacetic Acids (HAA5)
1.31 µg/L 2.2%
of the EPA limit 60 µg/L
 1/3 SYR4 2013–2018
38 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDibromoacetic AcidDichloroacetic AcidEthylbenzeneMercuryMonobromoacetic AcidNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
POFF, BRIAN
Email
poffbe@montgomerycountyva.gov

Frequently asked questions about Twin Boulders Subdivision

Is Twin Boulders Subdivision tap water safe to drink?

EPA monitoring detected 13 contaminants in Twin Boulders Subdivision's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Twin Boulders Subdivision's water?

EPA monitoring detected Copper, Lead, Lead, Nitrate-Nitrite, Barium, and others. The full list with the level and data source for each is above.

How many people does Twin Boulders Subdivision serve?

Twin Boulders Subdivision reports serving 90 people in Virginia, per its EPA record.

Has Twin Boulders Subdivision had any water quality violations?

The EPA has 333 violations on file for Twin Boulders Subdivision, of which 12 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.