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Tap water quality report

Centennial Estates

EPA monitoring tested this supplier for 74 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
15
detected
140
people served
17
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Ground water
Ownership
Private
Counties served
Rockingham

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
225
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2023-07-01 → 2023-09-30
MCL Health-based Resolved 2023-07-01 → 2023-09-30
MCL Health-based Resolved 2023-07-01 → 2023-09-30
MCL Health-based Resolved 2023-07-01 → 2023-09-30
MCL Health-based Resolved 2012-08-01 → 2012-08-31
MCL Health-based Resolved 2012-08-01 → 2012-08-31
MCL Health-based Resolved 2012-08-01 → 2012-08-31
MCL Health-based Resolved 2012-08-01 → 2012-08-31
MCL Health-based Archived 1995-04-01 → 1995-04-30
MCL Health-based Archived 1995-04-01 → 1995-04-30

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
Nitrate
5575 µg/L 56%
of the EPA limit 10000 µg/L
worst single sample: 5600 µg/L
22/24 SYR4 2014–2019
Copper
467.434 µg/L 36%
of the EPA limit 1300 µg/L
worst single sample: 528.716 µg/L
12/12 SYR4 2016–2019
Lead
11.1578 µg/L 74%
of the EPA limit 15 µg/L
worst single sample: 13.313 µg/L
9/11 SYR4 2016–2019
Bromoform
2.96 µg/L
No EPA limit set
worst single sample: 3 µg/L
5/9 SYR4 2014–2019
Dibromochloromethane
1.68 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
3/9 SYR4 2014–2019
TTHM
3.86 µg/L 4.8%
of the EPA limit 80 µg/L
worst single sample: 3.9 µg/L
3/9 SYR4 2014–2019
Barium
13.8056 µg/L 0.7%
of the EPA limit 2000 µg/L
worst single sample: 14 µg/L
2/2 SYR4 2016–2019
Dibromoacetic Acid
4.46 µg/L
No EPA limit set
worst single sample: 4.6 µg/L
2/3 SYR4 2016–2019
Chloroform
0.5000 µg/L
No EPA limit set
 1/9 SYR4 2014–2019
Chromium
1.44022 µg/L 1.4%
of the EPA limit 100 µg/L
 1/2 SYR4 2016–2019
Combined Radium (-226 And -228)
1.1 pCi/L 22%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
Combined Uranium
7.8 µg/L 26%
of the EPA limit 30 µg/L
 1/1 SYR4 2015
Fluoride
302 µg/L 7.6%
of the EPA limit 4000 µg/L
 1/2 SYR4 2016–2019
Gross Alpha, Excl. Radon And U
2.5 pCi/L 17%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
Total Haloacetic Acids (HAA5)
1.8 µg/L 3%
of the EPA limit 60 µg/L
 1/3 SYR4 2016–2019
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, TotalBromodichloromethaneChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ROBERT BELANGER

Frequently asked questions about Centennial Estates

Is Centennial Estates tap water safe to drink?

EPA monitoring detected 15 contaminants in Centennial Estates'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 Centennial Estates's water?

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

How many people does Centennial Estates serve?

Centennial Estates reports serving 140 people in New Hampshire, per its EPA record.

Has Centennial Estates had any water quality violations?

The EPA has 225 violations on file for Centennial Estates, 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.