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Tap water quality report

Chatham Water Department

EPA monitoring tested this supplier for 103 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

103
contaminants tested
16
detected
30,000
people served
28
health-based violations
Massachusetts rankingsLead in MassachusettsPFAS in Massachusetts
Water source
Ground water
Ownership
Local government
Counties served
Barnstable

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.

28
health-based violations
77
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-10-01 → 2015-10-31
MCL Health-based Resolved 2015-10-01 → 2015-10-31
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-09-01 → 2015-09-30
MCL Health-based Resolved 2015-05-01 → 2015-05-31
MCL Health-based Resolved 2015-05-01 → 2015-05-31
MCL Health-based Resolved 2012-05-01 → 2012-05-31
MCL Health-based Resolved 2012-05-01 → 2012-05-31
MCL Health-based Resolved 2009-09-01 → 2009-09-30
MCL Health-based Resolved 2009-09-01 → 2009-09-30

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
2400 µg/L 24%
of the EPA limit 10000 µg/L
worst single sample: 2600 µg/L
78/102 SYR4 2012–2019
TTHM
13.8 µg/L 17%
of the EPA limit 80 µg/L
worst single sample: 33 µg/L
69/70 SYR4 2012–2019
Chloroform
2.505 µg/L
No EPA limit set
worst single sample: 6.2 µg/L
60/60 SYR4 2013–2019
Dibromochloromethane
6.505 µg/L
No EPA limit set
worst single sample: 12 µg/L
50/60 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
5.15 µg/L 8.6%
of the EPA limit 60 µg/L
worst single sample: 19 µg/L
47/72 SYR4 2012–2019
Bromodichloromethane
3.185 µg/L
No EPA limit set
worst single sample: 10 µg/L
44/60 SYR4 2013–2019
Bromoform
4.32 µg/L
No EPA limit set
worst single sample: 6 µg/L
43/60 SYR4 2013–2019
Dibromoacetic Acid
1.76 µg/L
No EPA limit set
worst single sample: 2.3 µg/L
33/60 SYR4 2013–2019
Lead
0.0011 mg/L 7.3%
of the EPA limit 0.0150 mg/L
 24/24 LCR 2025
Copper
205 µg/L 16%
of the EPA limit 1300 µg/L
worst single sample: 300 µg/L
20/31 SYR4 2014–2018
Dichloroacetic Acid
1.475 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
10/60 SYR4 2013–2019
Trichloroacetic Acid
1.555 µg/L
No EPA limit set
worst single sample: 1.6 µg/L
10/60 SYR4 2013–2019
Monochloroacetic Acid
14.7 µg/L
No EPA limit set
worst single sample: 19 µg/L
6/60 SYR4 2013–2019
Barium
12.5 µg/L 0.6%
of the EPA limit 2000 µg/L
worst single sample: 13 µg/L
3/3 SYR4 2013–2019
Monobromoacetic Acid
0.7100 µg/L
No EPA limit set
 1/60 SYR4 2013–2019
Toluene
0.5900 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/25 SYR4 2012–2019
87 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-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CHARLES A WOOD
Phone
5089455150
Email
[email protected]

Frequently asked questions about Chatham Water Department

Is Chatham Water Department tap water safe to drink?

EPA monitoring detected 16 contaminants in Chatham 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 Chatham Water Department's water?

EPA monitoring detected Nitrate, TTHM, Chloroform, Dibromochloromethane, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Chatham Water Department serve?

Chatham Water Department reports serving 30,000 people in Massachusetts, per its EPA record.

Has Chatham Water Department had any water quality violations?

The EPA has 77 violations on file for Chatham Water Department, of which 28 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.