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Tap water quality report

Mountain Lakes Water District

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
787
people served
17
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Ground water
Ownership
Local government
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.

17
health-based violations
269
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2015-08-20
TT Health-based Resolved 2015-08-20
TT Health-based Resolved 2015-08-20
TT Health-based Resolved 2015-08-20
TT Health-based Resolved 2007-09-01
TT Health-based Resolved 2007-09-01
MCL Health-based Resolved 2004-11-01 → 2004-11-30
MCL Health-based Resolved 2004-11-01 → 2004-11-30
MCL Health-based Resolved 2004-11-01 → 2004-11-30
MCL Health-based Resolved 2004-11-01 → 2004-11-30

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
369.5 µg/L 28%
of the EPA limit 1300 µg/L
worst single sample: 740 µg/L
62/64 SYR4 2014–2019
Lead
31.75 µg/L 212%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 530 µg/L
22/60 SYR4 2014–2019
Chloroform
45.25 µg/L
No EPA limit set
worst single sample: 46 µg/L
6/11 SYR4 2015–2019
Bromodichloromethane
6.1 µg/L
No EPA limit set
worst single sample: 6.6 µg/L
5/11 SYR4 2015–2019
TTHM
51.88 µg/L 65%
of the EPA limit 80 µg/L
worst single sample: 53.1 µg/L
5/5 SYR4 2015–2019
Barium
11.55 µg/L 0.6%
of the EPA limit 2000 µg/L
worst single sample: 12 µg/L
4/4 SYR4 2016–2019
Dichloroacetic Acid
17.95 µg/L
No EPA limit set
worst single sample: 19 µg/L
4/5 SYR4 2015–2019
Total Haloacetic Acids (HAA5)
36.9 µg/L 62%
of the EPA limit 60 µg/L
worst single sample: 39 µg/L
4/5 SYR4 2015–2019
Trichloroacetic Acid
19.4 µg/L
No EPA limit set
worst single sample: 20 µg/L
4/5 SYR4 2015–2019
Combined Radium (-226 And -228)
0.4950 pCi/L 9.9%
of the EPA limit 5 pCi/L
worst single sample: 0.5000 pCi/L
2/2 SYR4 2016
Fluoride
269.5 µg/L 6.7%
of the EPA limit 4000 µg/L
worst single sample: 270 µg/L
2/4 SYR4 2016–2019
Gross Alpha, Excl. Radon And U
7.065 pCi/L 47%
of the EPA limit 15 pCi/L
worst single sample: 7.3 pCi/L
2/3 SYR4 2016–2019
Lead
0.0320 mg/L 213%
above the EPA limit of 0.0150 mg/L
 2/2 LCR 2014
Nitrate
600 µg/L 6%
of the EPA limit 10000 µg/L
 2/24 SYR4 2014–2019
Arsenic
1.6 µg/L 16%
of the EPA limit 10 µg/L
 1/4 SYR4 2016–2019
Combined Uranium
0.3000 µg/L 1%
of the EPA limit 30 µg/L
 1/3 SYR4 2016–2019
Dibromochloromethane
0.5000 µg/L
No EPA limit set
 1/11 SYR4 2015–2019
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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HAROLD CLOUGH

Frequently asked questions about Mountain Lakes Water District

Is Mountain Lakes Water District tap water safe to drink?

EPA monitoring detected 17 contaminants in Mountain Lakes Water District'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 Mountain Lakes Water District's water?

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

How many people does Mountain Lakes Water District serve?

Mountain Lakes Water District reports serving 787 people in New Hampshire, per its EPA record.

Has Mountain Lakes Water District had any water quality violations?

The EPA has 269 violations on file for Mountain Lakes Water District, of which 17 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.