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Tap water quality report

Hanson Water Department

EPA monitoring tested this supplier for 103 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

103
contaminants tested
18
detected
9,612
people served
12
health-based violations
Massachusetts rankingsLead in MassachusettsPFAS in Massachusetts
Water source
SWP
Ownership
Local government
Counties served
Plymouth

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.

12
health-based violations
109
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2011-03-01 → 2011-03-31
MCL Health-based Resolved 2011-03-01 → 2011-03-31
MCL Health-based Resolved 2008-10-01 → 2008-10-31
MCL Health-based Resolved 2008-10-01 → 2008-10-31
MCL Health-based Resolved 2008-10-01 → 2008-10-31
MCL Health-based Resolved 2008-10-01 → 2008-10-31
MCL Health-based Resolved 2006-11-01 → 2006-11-30
MCL Health-based Resolved 2006-11-01 → 2006-11-30
MCL Health-based Resolved 2006-10-01 → 2006-10-31
MCL Health-based Resolved 2006-10-01 → 2006-10-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOA 0.0056 µg/L 2/2 2025
PFOS 0.0040 µg/L 1/2 2025

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
Tetrachloroethylene
5.18 µg/L 104%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 18.8 µg/L
47/169 SYR4 2012–2019
TTHM
30.84 µg/L 39%
of the EPA limit 80 µg/L
worst single sample: 51.3 µg/L
33/33 SYR4 2012–2019
Nitrate
1089 µg/L 11%
of the EPA limit 10000 µg/L
worst single sample: 1100 µg/L
32/32 SYR4 2012–2019
Bromodichloromethane
10.9 µg/L
No EPA limit set
worst single sample: 14.3 µg/L
31/31 SYR4 2012–2019
Dibromochloromethane
8.5 µg/L
No EPA limit set
worst single sample: 9.5 µg/L
31/31 SYR4 2012–2019
Bromoform
4.165 µg/L
No EPA limit set
worst single sample: 4.6 µg/L
28/31 SYR4 2012–2019
Chloroform
17.745 µg/L
No EPA limit set
worst single sample: 33.2 µg/L
28/31 SYR4 2012–2019
Lead
0.0080 mg/L 53%
of the EPA limit 0.0150 mg/L
 19/19 LCR 2025
Total Haloacetic Acids (HAA5)
19.52 µg/L 33%
of the EPA limit 60 µg/L
worst single sample: 19.6 µg/L
17/33 SYR4 2012–2019
Dibromoacetic Acid
2.37 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
14/32 SYR4 2012–2019
Dichloroacetic Acid
10.37 µg/L
No EPA limit set
worst single sample: 11 µg/L
8/32 SYR4 2012–2019
Trichloroacetic Acid
8.475 µg/L
No EPA limit set
worst single sample: 8.5 µg/L
6/32 SYR4 2012–2019
Copper
58 µg/L 4.5%
of the EPA limit 1300 µg/L
worst single sample: 60 µg/L
3/5 SYR4 2012
Antimony, Total
9 µg/L 150%
of the EPA limit, at the 95th percentile of samples — 6 µg/L
 2/8 SYR4 2012–2019
Monochloroacetic Acid
2.285 µg/L
No EPA limit set
worst single sample: 2.3 µg/L
2/32 SYR4 2012–2019
Thallium, Total
1 µg/L 50%
of the EPA limit 2 µg/L
 1/8 SYR4 2012–2019
85 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaArsenicAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GERALD S DAVIS
Phone
7814471200
Email
[email protected]

Frequently asked questions about Hanson Water Department

Is Hanson Water Department tap water safe to drink?

EPA monitoring detected 18 contaminants in Hanson Water Department'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 Hanson Water Department's water?

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

How many people does Hanson Water Department serve?

Hanson Water Department reports serving 9,612 people in Massachusetts, per its EPA record.

Has Hanson Water Department had any water quality violations?

The EPA has 109 violations on file for Hanson Water Department, of which 12 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.