What was found in Aberdeen's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 4700 µg/L 47% of the EPA limit 10000 µg/L Highest in the city: CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 3030 µg/L 30% of the EPA limit 10000 µg/L Highest in the city: CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2018 | 1/2 | SYR4 |
| Fluoride | 532 µg/L 13% of the EPA limit 4000 µg/L Highest in the city: CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2019 | 1/2 | SYR4 |
| TTHM | 69.445 µg/L 87% of the EPA limit 80 µg/L Main supplier: CITY OF ABERDEEN · 18,006 people · 2019
Highest in the city: 78.364 µg/L — CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2019 | 2/2 | SYR4 |
| Chloroform | 37.5 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2019
Highest in the city: 66 µg/L — CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 46.79 µg/L 78% of the EPA limit 60 µg/L Main supplier: CITY OF ABERDEEN · 18,006 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 21 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2014 | 2/2 | SYR4 |
| Barium | 19 µg/L 1% of the EPA limit 2000 µg/L Highest in the city: CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 18.2 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2014 | 2/2 | SYR4 |
| Bromodichloromethane | 14.9 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2019
Highest in the city: 15 µg/L — CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 7.915 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2019 | 2/2 | SYR4 |
| Selenium | 7.3 µg/L 15% of the EPA limit 50 µg/L Highest in the city: CHAPEL HILL - ABERDEEN PROVING GROUNDS · 15,000 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 2.34 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2014 | 2/2 | SYR4 |
| Monobromoacetic Acid | 2.08 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2014 | 1/2 | SYR4 |
| Bromoform | 2 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 1.9 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2014 | 2/2 | SYR4 |
| Pfba | 0.0094 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| Pfpea | 0.0087 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| PFOS | 0.0086 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| Pfhxa | 0.0082 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| PFOA | 0.0076 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| PFHXS | 0.0058 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| PFBS | 0.0045 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| Pfhpa | 0.0043 µg/L No EPA limit set Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF ABERDEEN · 18,006 people · 2023 | 2/2 | LCR |
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 the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Aberdeen
| Supplier | Population served |
|---|---|
| CITY OF ABERDEEN | 18,006 |
| CHAPEL HILL - ABERDEEN PROVING GROUNDS | 15,000 |
Frequently asked questions about Aberdeen tap water
Is Aberdeen tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Aberdeen. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Aberdeen?
2 public water suppliers report drinking-water monitoring for Aberdeen, Maryland to the EPA. Each is listed above with its population served.
What contaminants are in Aberdeen's water?
The contaminants EPA monitoring detected in Aberdeen include Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.
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.