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Tap water quality report

Chapel Hill - Aberdeen Proving Grounds

EPA monitoring tested this supplier for 102 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

102
contaminants tested
15
detected
15,000
people served
0
health-based violations
Maryland rankingsLead in MarylandPFAS in Maryland
Water source
Ground water
Ownership
Local government
Counties served
Harford

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.

0
health-based violations
7
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2020-10-01
MR Monitoring Resolved 2020-10-01
MR Monitoring Resolved 2017-10-01
MR Monitoring Resolved 2013-10-01 → 2013-12-31
MR Monitoring Resolved 2013-10-01 → 2013-12-31
MR Monitoring Resolved 2010-07-01 → 2010-09-30
MR Monitoring Resolved 2010-07-01 → 2010-09-30

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
TTHM
78.364 µg/L 98%
of the EPA limit 80 µg/L
worst single sample: 93.1 µg/L
127/127 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
25.56 µg/L 43%
of the EPA limit 60 µg/L
worst single sample: 34.3 µg/L
127/127 SYR4 2012–2019
Bromodichloromethane
15 µg/L
No EPA limit set
worst single sample: 17 µg/L
57/57 SYR4 2012–2019
Chloroform
66 µg/L
No EPA limit set
worst single sample: 73 µg/L
57/57 SYR4 2012–2019
Dichloroacetic Acid
10 µg/L
No EPA limit set
worst single sample: 14 µg/L
46/46 SYR4 2012–2014
Trichloroacetic Acid
15.75 µg/L
No EPA limit set
worst single sample: 17 µg/L
46/46 SYR4 2012–2014
Dibromochloromethane
3.1 µg/L
No EPA limit set
worst single sample: 3.4 µg/L
44/55 SYR4 2012–2019
Nitrate
4700 µg/L 47%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Barium
19 µg/L 1%
of the EPA limit 2000 µg/L
 9/10 SYR4 2012–2019
Fluoride
532 µg/L 13%
of the EPA limit 4000 µg/L
worst single sample: 540 µg/L
9/10 SYR4 2012–2019
Dibromoacetic Acid
1.1 µg/L
No EPA limit set
 5/48 SYR4 2012–2014
Monochloroacetic Acid
1 µg/L
No EPA limit set
 1/48 SYR4 2012–2014
Nitrate-Nitrite
3030 µg/L 30%
of the EPA limit 10000 µg/L
 1/1 SYR4 2018
Selenium
7.3 µg/L 15%
of the EPA limit 50 µg/L
 1/11 SYR4 2012–2019
87 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ELY, JONATHAN
Phone
410-272-2650
Email
[email protected]

Frequently asked questions about Chapel Hill - Aberdeen Proving Grounds

Is Chapel Hill - Aberdeen Proving Grounds tap water safe to drink?

EPA monitoring detected 15 contaminants in Chapel Hill - Aberdeen Proving Grounds'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 Chapel Hill - Aberdeen Proving Grounds's water?

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

How many people does Chapel Hill - Aberdeen Proving Grounds serve?

Chapel Hill - Aberdeen Proving Grounds reports serving 15,000 people in Maryland, per its EPA record.

Has Chapel Hill - Aberdeen Proving Grounds had any water quality violations?

The EPA has 7 violations on file for Chapel Hill - Aberdeen Proving Grounds, of which 0 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.