Tap WaterIndex

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Tap water quality report

Locke Lake

EPA monitoring tested this supplier for 76 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

76
contaminants tested
16
detected
2,308
people served
42
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Surface water
Ownership
Private
Counties served
Belknap

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.

42
health-based violations
250
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-01-01 → 2018-03-31
MCL Health-based Resolved 2018-01-01 → 2018-03-31
MCL Health-based Resolved 2018-01-01 → 2018-03-31
MCL Health-based Resolved 2018-01-01 → 2018-03-31
MCL Health-based Resolved 2012-08-01 → 2012-08-31
MCL Health-based Resolved 2012-08-01 → 2012-08-31

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
Arsenic
17.3259 µg/L 173%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 23.2 µg/L
39/48 SYR4 2014–2019
Copper
292.35 µg/L 22%
of the EPA limit 1300 µg/L
worst single sample: 325 µg/L
24/24 SYR4 2014–2018
Bromodichloromethane
1.49 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
7/23 SYR4 2014–2019
Chloroform
2.91 µg/L
No EPA limit set
worst single sample: 3 µg/L
7/23 SYR4 2014–2019
Lead
8.19 µg/L 55%
of the EPA limit 15 µg/L
worst single sample: 11.1 µg/L
7/20 SYR4 2015–2018
TTHM
4.96 µg/L 6.2%
of the EPA limit 80 µg/L
worst single sample: 5.5 µg/L
7/23 SYR4 2014–2019
Barium
26.2747 µg/L 1.3%
of the EPA limit 2000 µg/L
worst single sample: 26.429 µg/L
4/4 SYR4 2014–2017
Fluoride
843.565 µg/L 21%
of the EPA limit 4000 µg/L
worst single sample: 850 µg/L
4/4 SYR4 2014–2017
Total Haloacetic Acids (HAA5)
3.88 µg/L 6.5%
of the EPA limit 60 µg/L
worst single sample: 4 µg/L
4/11 SYR4 2014–2019
Dichloroacetic Acid
2.08 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
3/11 SYR4 2014–2019
Dibromochloromethane
0.7900 µg/L
No EPA limit set
worst single sample: 0.8000 µg/L
2/23 SYR4 2014–2019
Trichloroacetic Acid
1.29 µg/L
No EPA limit set
worst single sample: 1.3 µg/L
2/11 SYR4 2014–2019
Chromium
1.381 µg/L 1.4%
of the EPA limit 100 µg/L
 1/4 SYR4 2014–2017
Combined Radium (-226 And -228)
1 pCi/L 20%
of the EPA limit 5 pCi/L
 1/2 SYR4 2017
Monochloroacetic Acid
4 µg/L
No EPA limit set
 1/11 SYR4 2014–2019
Toluene
0.5000 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/12 SYR4 2014–2019
60 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 TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitrateNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LESLIE MORGAN

Frequently asked questions about Locke Lake

Is Locke Lake tap water safe to drink?

EPA monitoring detected 16 contaminants in Locke Lake'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 Locke Lake's water?

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

How many people does Locke Lake serve?

Locke Lake reports serving 2,308 people in New Hampshire, per its EPA record.

Has Locke Lake had any water quality violations?

The EPA has 250 violations on file for Locke Lake, of which 42 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.