Is Tilton, NH Tap Water Safe? Quality & Contaminants

What was found in Tilton'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	1000 µg/L 10% of the EPA limit 10000 µg/L Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019 Highest in the city: 1020 µg/L — COUNTRY MEADOWS · 90 people · 2019	2/8	SYR4
Nitrate-Nitrite	970 µg/L 9.7% of the EPA limit 10000 µg/L Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	2/8	SYR4
Fluoride	606.85 µg/L 15% of the EPA limit 4000 µg/L Highest in the city: NORTHERN SHORES · 93 people · 2017	7/8	SYR4
Copper	197.5 µg/L 15% of the EPA limit 1300 µg/L Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019 Highest in the city: 328.3 µg/L — NORTHERN SHORES · 93 people · 2018	8/8	SYR4
Lead	28 µg/L 187% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2018	6/8	SYR4
Barium	26.825 µg/L 1.3% of the EPA limit 2000 µg/L Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	7/8	SYR4
TTHM	7.98 µg/L 10% of the EPA limit 80 µg/L Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	3/8	SYR4
Chromium	5 µg/L 5% of the EPA limit 100 µg/L Highest in the city: RODGERS DEV · 220 people · 2017	4/8	SYR4
Arsenic	4.895 µg/L 49% of the EPA limit 10 µg/L Highest in the city: COUNTRY MEADOWS · 90 people · 2018	5/8	SYR4
Chloroform	1.58 µg/L No EPA limit set Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019 Highest in the city: 4.49 µg/L — WINDY HILL/NORTH · 47 people · 2019	5/8	SYR4
Gross Alpha, Excl. Radon And U	4.035 pCi/L 27% of the EPA limit 15 pCi/L Highest in the city: COUNTRY MEADOWS · 90 people · 2015	4/8	SYR4
Total Haloacetic Acids (HAA5)	3.67 µg/L 6.1% of the EPA limit 60 µg/L Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	3/8	SYR4
Dibromochloromethane	3 µg/L No EPA limit set Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	2/8	SYR4
Bromodichloromethane	2.46 µg/L No EPA limit set Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	3/8	SYR4
Dibromoacetic Acid	1.96 µg/L No EPA limit set Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	1/8	SYR4
Dichloroacetic Acid	1.9 µg/L No EPA limit set Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	3/8	SYR4
Bromoform	1.66 µg/L No EPA limit set Main supplier: LOCHMERE VILLAGE DIST · 405 people · 2019	2/8	SYR4
Combined Radium (-226 And -228)	1.625 pCi/L 33% of the EPA limit 5 pCi/L Highest in the city: WINDY HILL/NORTH · 47 people · 2019	5/8	SYR4
Trichloroacetic Acid	1.6 µg/L No EPA limit set Highest in the city: NORTHERN SHORES · 93 people · 2019	1/8	SYR4
Di(2-ethylhexyl) Phthalate	1.2 µg/L 20% of the EPA limit 6 µg/L Highest in the city: WINDY HILL/NORTH · 47 people · 2019	1/8	SYR4
Simazine	0.0700 µg/L 1.8% of the EPA limit 4 µg/L Highest in the city: RODGERS DEV · 220 people · 2018	1/8	SYR4

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 Tilton

Supplier	Population served
LOCHMERE VILLAGE DIST	405
RODGERS DEV	220
WINNISQUAM VILLAGE CONDOS	133
NORTHERN SHORES	93
COUNTRY MEADOWS	90
WINDY HILL/SOUTH	73
WINDY HILL/NORTH	47
WINNISQUAM RESORT CONDOS	42

Frequently asked questions about Tilton tap water

Is Tilton tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Tilton. 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 Tilton?

8 public water suppliers report drinking-water monitoring for Tilton, New Hampshire to the EPA. Each is listed above with its population served.

What contaminants are in Tilton's water?

The contaminants EPA monitoring detected in Tilton include Nitrate, Nitrate-Nitrite, Fluoride, Copper, 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.