What was found in Tyngsborough'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 | 3515 µg/L 35% of the EPA limit 10000 µg/L Highest in the city: RIVER CROSSING CONDOMINIUM · 150 people · 2019 | 4/5 | SYR4 |
| Fluoride | 614 µg/L 15% of the EPA limit 4000 µg/L Highest in the city: RIVER CROSSING CONDOMINIUM · 150 people · 2017 | 2/5 | SYR4 |
| Barium | 86.85 µg/L 4.3% of the EPA limit 2000 µg/L Highest in the city: RIVER CROSSING CONDOMINIUM · 150 people · 2017 | 4/5 | SYR4 |
| Copper | 86 µg/L 6.6% of the EPA limit 1300 µg/L Highest in the city: BENCHMARK CONDOMINIUMS · 60 people · 2019 | 2/5 | SYR4 |
| Monochloroacetic Acid | 71.55 µg/L No EPA limit set Highest in the city: COLONY HEIGHTS CONDOMINIUM · 120 people · 2019 | 1/5 | SYR4 |
| TTHM | 69.54 µg/L 87% of the EPA limit 80 µg/L Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019 | 2/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16.77 µg/L 28% of the EPA limit 60 µg/L Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019
Highest in the city: 54.4 µg/L — COLONY HEIGHTS CONDOMINIUM · 120 people · 2019 | 2/5 | SYR4 |
| Chloroform | 52.7 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019 | 2/5 | SYR4 |
| Combined Uranium | 15.565 µg/L 52% of the EPA limit 30 µg/L Highest in the city: COLONY HEIGHTS CONDOMINIUM · 120 people · 2017 | 4/5 | SYR4 |
| Bromodichloromethane | 15 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019 | 2/5 | SYR4 |
| Trichloroacetic Acid | 11.2 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019 | 2/5 | SYR4 |
| Lead | 10.8 µg/L 72% of the EPA limit 15 µg/L Highest in the city: BENCHMARK CONDOMINIUMS · 60 people · 2015 | 1/5 | SYR4 |
| Dichloroacetic Acid | 8.06 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019 | 1/5 | SYR4 |
| Dibromochloromethane | 7.04 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019 | 2/5 | SYR4 |
| Toluene | 4.5 µg/L 0.5% of the EPA limit 1000 µg/L Highest in the city: COLONY HEIGHTS CONDOMINIUM · 120 people · 2019 | 2/5 | SYR4 |
| Arsenic | 3.4 µg/L 34% of the EPA limit 10 µg/L Highest in the city: COLONY HEIGHTS CONDOMINIUM · 120 people · 2018 | 3/5 | SYR4 |
| Dibromoacetic Acid | 2.85 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019 | 2/5 | SYR4 |
| Xylenes, Total | 2.1 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: RIVER CROSSING CONDOMINIUM · 150 people · 2019 | 1/5 | SYR4 |
| Bromoform | 1.31 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2019
Highest in the city: 1.33 µg/L — COLONY HEIGHTS CONDOMINIUM · 120 people · 2019 | 2/5 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Highest in the city: BENCHMARK CONDOMINIUMS · 60 people · 2017 | 1/5 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9835 µg/L 16% of the EPA limit 6 µg/L Highest in the city: CURTIS HILL CONDOMINIUM · 96 people · 2018 | 2/5 | SYR4 |
| Ethylbenzene | 0.5500 µg/L 0.1% of the EPA limit 700 µg/L Highest in the city: RIVER CROSSING CONDOMINIUM · 150 people · 2019 | 1/5 | SYR4 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2023
Highest in the city: 0.0057 mg/L — CURTIS HILL CONDOMINIUM · 96 people · 2025 | 5/5 | LCR |
| PFOA | 0.0046 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2023 | 1/5 | UCMR-5 |
| Pfhxa | 0.0036 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2023 | 1/5 | UCMR-5 |
| Pfpea | 0.0030 µg/L No EPA limit set Main supplier: TYNGSBOROUGH WATER DISTRICT · 4,416 people · 2023 | 1/5 | UCMR-5 |
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 Tyngsborough
| Supplier | Population served |
|---|---|
| TYNGSBOROUGH WATER DISTRICT | 4,416 |
| RIVER CROSSING CONDOMINIUM | 150 |
| COLONY HEIGHTS CONDOMINIUM | 120 |
| CURTIS HILL CONDOMINIUM | 96 |
| BENCHMARK CONDOMINIUMS | 60 |
Frequently asked questions about Tyngsborough tap water
Is Tyngsborough tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Tyngsborough. 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 Tyngsborough?
5 public water suppliers report drinking-water monitoring for Tyngsborough, Massachusetts to the EPA. Each is listed above with its population served.
What contaminants are in Tyngsborough's water?
The contaminants EPA monitoring detected in Tyngsborough include Nitrate, Fluoride, Barium, Copper, Monochloroacetic Acid. 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.