Is Bonnie Brook Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Dorchester

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Resolved	2012-11-30
TT	Health-based	Resolved	2010-11-30
Other	Monitoring	Resolved	2012-07-01
Other	Monitoring	Resolved	2009-07-01
Other	Monitoring	Resolved	2008-07-01
Other	Monitoring	Resolved	2008-07-01
Other	Monitoring	Resolved	2008-07-01
Other	Monitoring	Resolved	2007-07-01
Other	Monitoring	Resolved	2007-07-01
MR	Monitoring	Resolved	2005-02-01 → 2005-02-28

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	13/13	LCR	2023
Bromodichloromethane	5.4995 µg/L No EPA limit set worst single sample: 5.81 µg/L	4/4	SYR4	2012–2015
Chloroform	6.94 µg/L No EPA limit set worst single sample: 7.27 µg/L	4/4	SYR4	2012–2015
TTHM	21.299 µg/L 27% of the EPA limit 80 µg/L worst single sample: 22.07 µg/L	4/4	SYR4	2012–2018
Total Haloacetic Acids (HAA5)	6.927 µg/L 12% of the EPA limit 60 µg/L worst single sample: 7.02 µg/L	4/4	SYR4	2012–2018
Dibromochloromethane	3.724 µg/L No EPA limit set worst single sample: 3.85 µg/L	3/4	SYR4	2012–2015
Dichloroacetic Acid	3.16 µg/L No EPA limit set worst single sample: 3.38 µg/L	3/3	SYR4	2012–2015
Fluoride	1157.7 µg/L 29% of the EPA limit 4000 µg/L worst single sample: 1190 µg/L	3/3	SYR4	2013–2019
Trichloroacetic Acid	2.3755 µg/L No EPA limit set worst single sample: 2.42 µg/L	2/3	SYR4	2012–2015
Arsenic	4.1 µg/L 41% of the EPA limit 10 µg/L	1/3	SYR4	2013–2019
Dibromoacetic Acid	1.22 µg/L No EPA limit set	1/3	SYR4	2012–2015
Gross Beta Particle Activity	5.5 pCi/L No EPA limit set	1/1	SYR4	2015

58 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, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrateOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: QUATHAMER, HENRY
Phone: 443-205-5282
Email: hquathamer@dorchestermd.gov

Frequently asked questions about Bonnie Brook

Is Bonnie Brook tap water safe to drink?

EPA monitoring detected 12 contaminants in Bonnie Brook'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 Bonnie Brook's water?

EPA monitoring detected Lead, Bromodichloromethane, Chloroform, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Bonnie Brook serve?

Bonnie Brook reports serving 390 people in Maryland, per its EPA record.

Has Bonnie Brook had any water quality violations?

The EPA has 31 violations on file for Bonnie Brook, of which 2 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.