What was found in Tiverton'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-Nitrite | 4237.5 µg/L 42% of the EPA limit 10000 µg/L Highest in the city: HERITAGE PARK HOME CO-OPERATIVE · 60 people · 2019 | 3/6 | SYR4 |
| Nitrate | 3400 µg/L 34% of the EPA limit 10000 µg/L Highest in the city: HERITAGE PARK HOME CO-OPERATIVE · 60 people · 2017 | 4/6 | SYR4 |
| Copper | 196.65 µg/L 15% of the EPA limit 1300 µg/L Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2017
Highest in the city: 403.2 µg/L — LAWRENCE SUNSET COVE ASSOCIATION · 36 people · 2019 | 6/6 | SYR4 |
| Fluoride | 386 µg/L 9.7% of the EPA limit 4000 µg/L Highest in the city: FOUR SEASONS MHP CO-OP ASSN. · 40 people · 2018 | 1/6 | SYR4 |
| TTHM | 88.82 µg/L 111% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019 | 3/6 | SYR4 |
| Barium | 77 µg/L 3.9% of the EPA limit 2000 µg/L Highest in the city: HERITAGE PARK HOME CO-OPERATIVE · 60 people · 2018 | 4/6 | SYR4 |
| Chloroform | 56.59 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019 | 3/6 | SYR4 |
| Lead | 17.635 µg/L 118% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2017
Highest in the city: 40.45 µg/L — LAWRENCE SUNSET COVE ASSOCIATION · 36 people · 2019 | 6/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 34 µg/L 57% of the EPA limit 60 µg/L Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019 | 3/6 | SYR4 |
| Dichloroacetic Acid | 17.1 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019
Highest in the city: 19 µg/L — STONE BRIDGE FIRE DISTRICT · 2,793 people · 2019 | 3/6 | SYR4 |
| Bromodichloromethane | 12.54 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019
Highest in the city: 16 µg/L — STONE BRIDGE FIRE DISTRICT · 2,793 people · 2019 | 3/6 | SYR4 |
| Trichloroacetic Acid | 13.1 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019 | 3/6 | SYR4 |
| Monobromoacetic Acid | 8.44 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019 | 2/6 | SYR4 |
| Monochloroacetic Acid | 7.2 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019 | 3/6 | SYR4 |
| Dibromochloromethane | 4.02 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019
Highest in the city: 4.33 µg/L — STONE BRIDGE FIRE DISTRICT · 2,793 people · 2019 | 3/6 | SYR4 |
| Dibromoacetic Acid | 2.69 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019
Highest in the city: 3.24 µg/L — TIVERTON WATER AUTHORITY, TOWN HALL · 3,213 people · 2019 | 3/6 | SYR4 |
| Chromium | 3 µg/L 3% of the EPA limit 100 µg/L Highest in the city: HERITAGE PARK HOME CO-OPERATIVE · 60 people · 2018 | 2/6 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.85 µg/L 31% of the EPA limit 6 µg/L Highest in the city: STONE BRIDGE FIRE DISTRICT · 2,793 people · 2019 | 2/6 | SYR4 |
| Combined Radium (-226 And -228) | 1.4 pCi/L 28% of the EPA limit 5 pCi/L Highest in the city: LAWRENCE SUNSET COVE ASSOCIATION · 36 people · 2016 | 1/6 | SYR4 |
| Bromoform | 0.2395 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2019 | 2/6 | SYR4 |
| Benzo(A)Pyrene | 0.1000 µg/L 50% of the EPA limit 0.2000 µg/L Highest in the city: STONE BRIDGE FIRE DISTRICT · 2,793 people · 2019 | 1/6 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2023
Highest in the city: 0.0050 mg/L — STONE BRIDGE FIRE DISTRICT · 2,793 people · 2011 | 6/6 | LCR |
| PFOA | 0.0040 µg/L No EPA limit set Main supplier: NORTH TIVERTON FIRE DISTRICT · 8,969 people · 2025 | 1/6 | 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 Tiverton
| Supplier | Population served |
|---|---|
| NORTH TIVERTON FIRE DISTRICT | 8,969 |
| TIVERTON WATER AUTHORITY, TOWN HALL | 3,213 |
| STONE BRIDGE FIRE DISTRICT | 2,793 |
| HERITAGE PARK HOME CO-OPERATIVE | 60 |
| FOUR SEASONS MHP CO-OP ASSN. | 40 |
| LAWRENCE SUNSET COVE ASSOCIATION | 36 |
Frequently asked questions about Tiverton tap water
Is Tiverton tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Tiverton. 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 Tiverton?
6 public water suppliers report drinking-water monitoring for Tiverton, Rhode Island to the EPA. Each is listed above with its population served.
What contaminants are in Tiverton's water?
The contaminants EPA monitoring detected in Tiverton include Nitrate-Nitrite, Nitrate, Copper, Fluoride, TTHM. 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.