What was found in Conway'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 |
|---|---|---|---|
| Fluoride | 856.5 µg/L 21% of the EPA limit 4000 µg/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2018
Highest in the city: 3915 µg/L — ROCKHOUSE MOUNTAIN · 480 people · 2019 | 22/24 | SYR4 |
| Nitrate | 460 µg/L 4.6% of the EPA limit 10000 µg/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2019
Highest in the city: 2892.9 µg/L — DEERBROOK CONDOS · 80 people · 2019 | 14/24 | SYR4 |
| Copper | 306.06 µg/L 24% of the EPA limit 1300 µg/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2019
Highest in the city: 1635.74 µg/L — OAKWOOD HEIGHTS · 63 people · 2019 | 24/24 | SYR4 |
| Nitrate-Nitrite | 313.5 µg/L 3.1% of the EPA limit 10000 µg/L Highest in the city: CATHEDRAL LEDGE · 153 people · 2019 | 1/24 | SYR4 |
| Lead | 29.4262 µg/L 196% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2019
Highest in the city: 105.25 µg/L — MELODY PINES CONDOS · 125 people · 2019 | 21/24 | SYR4 |
| Barium | 5.16 µg/L 0.3% of the EPA limit 2000 µg/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2018
Highest in the city: 52.6 µg/L — WOODLAND GROVE · 185 people · 2018 | 16/24 | SYR4 |
| Combined Uranium | 38 µg/L 127% of the EPA limit, at the 95th percentile of samples — 30 µg/L Highest in the city: ROCKHOUSE MOUNTAIN · 480 people · 2019 | 16/24 | SYR4 |
| Lithium | 37.1 µg/L No EPA limit set Highest in the city: SACO RIVER FOREST · 63 people · 2025 | 1/24 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 14.64 pCi/L 98% of the EPA limit 15 pCi/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2016
Highest in the city: 30.92 pCi/L — CONWAY WATER AND SEWER · 2,745 people · 2015 | 15/24 | SYR4 |
| Total Haloacetic Acids (HAA5) | 12 µg/L 20% of the EPA limit 60 µg/L Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 1/24 | SYR4 |
| Monochloroacetic Acid | 11.5 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 1/24 | SYR4 |
| TTHM | 10.785 µg/L 13% of the EPA limit 80 µg/L Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 4/24 | SYR4 |
| Chloroform | 6.72 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 4/24 | SYR4 |
| Dichloroacetic Acid | 6.165 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 1/24 | SYR4 |
| Trichloroacetic Acid | 4.2 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 1/24 | SYR4 |
| Bromodichloromethane | 4.135 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 2/24 | SYR4 |
| Arsenic | 4 µg/L 40% of the EPA limit 10 µg/L Highest in the city: ROCKHOUSE MOUNTAIN · 480 people · 2019 | 4/24 | SYR4 |
| Beryllium, Total | 3.88903 µg/L 97% of the EPA limit 4 µg/L Highest in the city: FOREST PARK VILLAGE · 45 people · 2019 | 1/24 | SYR4 |
| Chromium | 3.40925 µg/L 3.4% of the EPA limit 100 µg/L Highest in the city: OAKWOOD HEIGHTS · 63 people · 2019 | 8/24 | SYR4 |
| Combined Radium (-226 And -228) | 1.39 pCi/L 28% of the EPA limit 5 pCi/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2019
Highest in the city: 3.1 pCi/L — SACO PINES · 50 people · 2017 | 17/24 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.6 µg/L 43% of the EPA limit 6 µg/L Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 1/24 | SYR4 |
| Dibromochloromethane | 2.44 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 3/24 | SYR4 |
| Bromoform | 1.525 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 2/24 | SYR4 |
| Dibromoacetic Acid | 1.39 µg/L No EPA limit set Highest in the city: CONWAY WATER AND SEWER · 2,745 people · 2019 | 1/24 | SYR4 |
| Tetrachloroethylene | 0.6000 µg/L 12% of the EPA limit 5 µg/L Highest in the city: DEERBROOK CONDOS · 80 people · 2019 | 1/24 | SYR4 |
| Mercury | 0.1000 µg/L 5% of the EPA limit 2 µg/L Highest in the city: SACO WOODS CONDOS · 240 people · 2019 | 1/24 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: NORTH CONWAY WATER PCT · 5,500 people · 2024
Highest in the city: 0.0880 mg/L — MELODY PINES CONDOS · 125 people · 2018 | 12/24 | 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 Conway
| Supplier | Population served |
|---|---|
| NORTH CONWAY WATER PCT | 5,500 |
| CONWAY WATER AND SEWER | 2,745 |
| BIRCH HILL EAST | 560 |
| ROCKHOUSE MOUNTAIN | 480 |
| MOUNTAIN VALE VILLAGE MHP | 388 |
| SACO WOODS CONDOS | 240 |
| HALE ESTATES | 220 |
| WOODLAND GROVE | 185 |
| REBECCA LANE WATER SYS | 155 |
| CATHEDRAL LEDGE | 153 |
| MELODY PINES CONDOS | 125 |
| FOREST EDGE | 118 |
| ECHO LAKE WOODS | 110 |
| CEDAR CREEK | 105 |
| DEERBROOK CONDOS | 80 |
| DAVIS HILL | 75 |
| SOUTH PINES | 70 |
| NORTH PINES | 67 |
| SACO RIVER FOREST | 63 |
| NEAR LEDGE | 63 |
| OAKWOOD HEIGHTS | 63 |
| SACO PINES | 50 |
| FOREST PARK VILLAGE | 45 |
| BROOK VIEW VILLAGE | 40 |
Frequently asked questions about Conway tap water
Is Conway tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Conway. 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 Conway?
24 public water suppliers report drinking-water monitoring for Conway, New Hampshire to the EPA. Each is listed above with its population served.
What contaminants are in Conway's water?
The contaminants EPA monitoring detected in Conway include Fluoride, Nitrate, Copper, Nitrate-Nitrite, Lead. 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.