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Tap water quality report

Jonestown Water

EPA monitoring tested this supplier for 70 contaminants and detected 6. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
6
detected
150
people served
15
health-based violations
Maryland rankingsLead in MarylandPFAS in Maryland
Water source
Ground water
Ownership
Private
Counties served
Caroline

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.

15
health-based violations
168
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2005-10-01 → 2005-10-31
MCL Health-based Resolved 2005-08-01 → 2005-08-31
MCL Health-based Resolved 2005-07-01 → 2005-07-31
MCL Health-based Resolved 2002-12-01 → 2002-12-31
MCL Health-based Resolved 1999-09-01 → 1999-09-30
MCL Health-based Resolved 1999-09-01 → 1999-09-30
MCL Health-based Resolved 1994-09-01 → 1994-09-30
MCL Health-based Resolved 1994-09-01 → 1994-09-30
MCL Health-based Resolved 1994-09-01 → 1994-09-30
MCL Health-based Resolved 1994-09-01 → 1994-09-30

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2024
Bromodichloromethane
1.3475 µg/L
No EPA limit set
worst single sample: 1.36 µg/L
2/2 SYR4 2014–2015
Chloroform
2.4735 µg/L
No EPA limit set
worst single sample: 2.52 µg/L
2/2 SYR4 2014–2015
TTHM
4.3625 µg/L 5.5%
of the EPA limit 80 µg/L
worst single sample: 4.45 µg/L
2/2 SYR4 2014–2017
Dibromochloromethane
0.9800 µg/L
No EPA limit set
 1/2 SYR4 2014–2015
Gross Beta Particle Activity
9.5 pCi/L
No EPA limit set
 1/1 SYR4 2012
64 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneFluorideGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
BROWN, KEVIN
Phone
410-479-0520
Email
[email protected]

Frequently asked questions about Jonestown Water

Is Jonestown Water tap water safe to drink?

EPA monitoring detected 6 contaminants in Jonestown Water'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 Jonestown Water's water?

EPA monitoring detected Lead, Bromodichloromethane, Chloroform, TTHM, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Jonestown Water serve?

Jonestown Water reports serving 150 people in Maryland, per its EPA record.

Has Jonestown Water had any water quality violations?

The EPA has 168 violations on file for Jonestown Water, of which 15 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.