What was found in ZIP 21771
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 6300 µg/L 63% of the EPA limit 10000 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 5500 µg/L 55% of the EPA limit 10000 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2015 | 1/1 | SYR4 |
| Fluoride | 1112.5 µg/L 28% of the EPA limit 4000 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2018 | 1/1 | SYR4 |
| TTHM | 7.96 µg/L 10% of the EPA limit 80 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2019 | 1/1 | SYR4 |
| Selenium | 7.2 µg/L 14% of the EPA limit 50 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2019 | 1/1 | SYR4 |
| Chloroform | 3.725 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 3 pCi/L 60% of the EPA limit 5 pCi/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2016 | 1/1 | SYR4 |
| Bromodichloromethane | 2.6 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2019 | 1/1 | SYR4 |
| Arsenic | 2.3 µg/L 23% of the EPA limit 10 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.0925 µg/L 35% of the EPA limit 6 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2018 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.9 µg/L 3.2% of the EPA limit 60 µg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.895 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2014 | 1/1 | SYR4 |
| Dibromochloromethane | 1.585 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2015 | 1/1 | SYR4 |
| Pfpea | 0.0227 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2023 | 1/1 | UCMR-5 |
| Pfhxa | 0.0184 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2023 | 1/1 | UCMR-5 |
| PFOA | 0.0127 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2023 | 1/1 | UCMR-5 |
| Pfba | 0.0116 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2023 | 1/1 | UCMR-5 |
| PFBS | 0.0066 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2023 | 1/1 | UCMR-5 |
| PFOS | 0.0060 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2023 | 1/1 | UCMR-5 |
| Pfhpa | 0.0059 µg/L No EPA limit set Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2023 | 1/1 | UCMR-5 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: TOWN OF MOUNT AIRY · 9,890 people · 2024 | 1/1 | 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.
Water suppliers serving ZIP 21771
| Supplier | State | Population served |
|---|---|---|
| TOWN OF MOUNT AIRY | MD | 9,890 |
Frequently asked questions about ZIP 21771 tap water
Is the tap water in ZIP 21771 safe to drink?
EPA testing detected 21 contaminants across the water suppliers serving ZIP 21771. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 21771?
1 public water supplier report EPA drinking-water monitoring for ZIP 21771. Each is listed above with its population served.
What contaminants are in ZIP 21771's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Selenium, and others across this ZIP's suppliers. The full list with levels and sources is above.