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Tap water quality report

Highland Colony

EPA monitoring tested this supplier for 69 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

69
contaminants tested
7
detected
88
people served
40
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Ground water
Ownership
Private
Counties served
Grafton

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.

40
health-based violations
49
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2022-01-11
TT Health-based Resolved 2022-01-11
TT Health-based Resolved 2022-01-11
TT Health-based Resolved 2022-01-11
TT Health-based Resolved 2012-09-15
TT Health-based Resolved 2012-09-15
TT Health-based Resolved 2012-09-15
TT Health-based Resolved 2012-09-15
MCL Health-based Resolved 2005-06-01 → 2005-06-30
MCL Health-based Resolved 2005-06-01 → 2005-06-30

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
352.9 µg/L 27%
of the EPA limit 1300 µg/L
worst single sample: 377.5 µg/L
11/12 SYR4 2015–2018
trans-1,2-Dichloroethylene
2.04 µg/L 2%
of the EPA limit 100 µg/L
worst single sample: 2.4 µg/L
10/24 SYR4 2014–2019
Lead
4.24 µg/L 28%
of the EPA limit 15 µg/L
worst single sample: 4.8 µg/L
9/10 SYR4 2015–2018
Fluoride
1195 µg/L 30%
of the EPA limit 4000 µg/L
worst single sample: 1200 µg/L
2/2 SYR4 2015–2018
Chloroform
0.5000 µg/L
No EPA limit set
 1/24 SYR4 2014–2019
Combined Radium (-226 And -228)
0.3000 pCi/L 6%
of the EPA limit 5 pCi/L
 1/1 SYR4 2016
Lead
0.0320 mg/L 213%
above the EPA limit of 0.0150 mg/L
 1/1 LCR 2021
62 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-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzene

Utility contact

Contact
NANCY EHLERS

Frequently asked questions about Highland Colony

Is Highland Colony tap water safe to drink?

EPA monitoring detected 7 contaminants in Highland Colony'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 Highland Colony's water?

EPA monitoring detected Copper, trans-1,2-Dichloroethylene, Lead, Fluoride, Chloroform, and others. The full list with the level and data source for each is above.

How many people does Highland Colony serve?

Highland Colony reports serving 88 people in New Hampshire, per its EPA record.

Has Highland Colony had any water quality violations?

The EPA has 49 violations on file for Highland Colony, of which 40 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.