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Tap water quality report

Tilton Northfield Water Dist

EPA monitoring tested this supplier for 76 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

76
contaminants tested
17
detected
2,500
people served
4
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Ground water
Ownership
Local government
Counties served
Merrimack

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

4
health-based violations
377
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 1992-01-01 → 1998-01-05
MCL Health-based Archived 1991-10-01 → 1991-10-31
MCL Health-based Archived 1991-10-01 → 1991-10-31
MCL Health-based Archived 1991-10-01 → 1991-10-31
MR Monitoring Resolved 2021-12-30
MR Monitoring Resolved 2021-12-30
MR Monitoring Resolved 2019-04-01 → 2019-07-01
MR Monitoring Resolved 2019-04-01 → 2019-07-01
MR Monitoring Resolved 2018-07-01 → 2018-10-01
MR Monitoring Resolved 2018-07-01 → 2018-10-01

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
310.88 µg/L 24%
of the EPA limit 1300 µg/L
worst single sample: 2460 µg/L
73/75 SYR4 2014–2019
Nitrate
676 µg/L 6.8%
of the EPA limit 10000 µg/L
worst single sample: 700 µg/L
24/24 SYR4 2014–2019
Lead
66.5 µg/L 443%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 77.9 µg/L
21/71 SYR4 2014–2019
Bromodichloromethane
3.87 µg/L
No EPA limit set
worst single sample: 4.2 µg/L
12/22 SYR4 2014–2019
Dibromochloromethane
3.725 µg/L
No EPA limit set
worst single sample: 4 µg/L
12/22 SYR4 2014–2019
Nitrate-Nitrite
622 µg/L 6.2%
of the EPA limit 10000 µg/L
worst single sample: 710 µg/L
12/12 SYR4 2014–2019
TTHM
11.9 µg/L 15%
of the EPA limit 80 µg/L
worst single sample: 13 µg/L
12/12 SYR4 2014–2019
Chloroform
2.85 µg/L
No EPA limit set
worst single sample: 3.2 µg/L
11/22 SYR4 2014–2019
Lead
0.0360 mg/L 240%
above the EPA limit of 0.0150 mg/L
 6/6 LCR 2014
Bromoform
1.36 µg/L
No EPA limit set
worst single sample: 1.4 µg/L
5/22 SYR4 2014–2019
Barium
10.225 µg/L 0.5%
of the EPA limit 2000 µg/L
worst single sample: 10.6 µg/L
4/4 SYR4 2015–2018
Combined Radium (-226 And -228)
0.2900 pCi/L 5.8%
of the EPA limit 5 pCi/L
worst single sample: 0.3000 pCi/L
2/2 SYR4 2015
Dichloroacetic Acid
1.685 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
2/12 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
2.795 µg/L 4.7%
of the EPA limit 60 µg/L
worst single sample: 2.8 µg/L
2/12 SYR4 2014–2019
Dibromoacetic Acid
1.3 µg/L
No EPA limit set
 1/12 SYR4 2014–2019
Gross Alpha, Excl. Radon And U
1 pCi/L 6.7%
of the EPA limit 15 pCi/L
 1/2 SYR4 2015
Trichloroacetic Acid
1.1 µg/L
No EPA limit set
 1/12 SYR4 2014–2019
59 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
JOHN CHASE

Frequently asked questions about Tilton Northfield Water Dist

Is Tilton Northfield Water Dist tap water safe to drink?

EPA monitoring detected 17 contaminants in Tilton Northfield Water Dist's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Tilton Northfield Water Dist's water?

EPA monitoring detected Copper, Nitrate, Lead, Bromodichloromethane, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Tilton Northfield Water Dist serve?

Tilton Northfield Water Dist reports serving 2,500 people in New Hampshire, per its EPA record.

Has Tilton Northfield Water Dist had any water quality violations?

The EPA has 377 violations on file for Tilton Northfield Water Dist, of which 4 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.