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Tap water quality report

Southwest Harbor Water & Sewer District

EPA monitoring tested this supplier for 54 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

54
contaminants tested
13
detected
2,480
people served
426
health-based violations
Maine rankingsLead in MainePFAS in Maine
Water source
Surface water
Ownership
Local government
Counties served
Hancock

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.

426
health-based violations
529
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2020-04-01 → 2020-06-30
MCL Health-based Resolved 2020-04-01 → 2020-06-30
MCL Health-based Resolved 2020-04-01 → 2020-06-30
MCL Health-based Resolved 2020-04-01 → 2020-06-30
MCL Health-based Resolved 2020-04-01 → 2020-06-30
MCL Health-based Resolved 2020-01-01 → 2020-03-31
MCL Health-based Resolved 2020-01-01 → 2020-03-31
MCL Health-based Resolved 2020-01-01 → 2020-03-31
MCL Health-based Resolved 2020-01-01 → 2020-03-31
MCL Health-based Resolved 2020-01-01 → 2020-03-31

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
TTHM
96.9 µg/L 121%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 110 µg/L
31/31 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
61.9 µg/L 103%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 82.5 µg/L
27/28 SYR4 2012–2019
Copper
128 µg/L 9.8%
of the EPA limit 1300 µg/L
worst single sample: 130 µg/L
25/28 SYR4 2012–2019
Chloroform
69.4 µg/L
No EPA limit set
worst single sample: 77 µg/L
20/20 SYR4 2012–2017
Bromodichloromethane
7.43 µg/L
No EPA limit set
worst single sample: 7.7 µg/L
19/20 SYR4 2012–2017
Fluoride
1010 µg/L 25%
of the EPA limit 4000 µg/L
worst single sample: 1100 µg/L
19/25 SYR4 2012–2019
Dichloroacetic Acid
32.8 µg/L
No EPA limit set
worst single sample: 36 µg/L
17/19 SYR4 2012–2017
Lead
0.0021 mg/L 14%
of the EPA limit 0.0150 mg/L
 16/16 LCR 2024
Trichloroacetic Acid
32.25 µg/L
No EPA limit set
worst single sample: 36 µg/L
16/19 SYR4 2012–2017
Barium
1.9 µg/L 0.1%
of the EPA limit 2000 µg/L
 8/8 SYR4 2012–2019
Lead
5.43 µg/L 36%
of the EPA limit 15 µg/L
worst single sample: 6.06 µg/L
7/28 SYR4 2012–2019
Monochloroacetic Acid
2.4 µg/L
No EPA limit set
 4/19 SYR4 2012–2017
Combined Radium (-226 And -228)
1.044 pCi/L 21%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
41 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBenzeneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumCombined UraniumDichloromethaneDibromoacetic AcidDibromochloromethaneEthylene DibromideEthylbenzeneGross Alpha, Excl. Radon And UMercuryMonobromoacetic AcidNitrateNitrate-NitriteNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ZUREK, AARON
Phone
207-244-3948
Email
[email protected]

Frequently asked questions about Southwest Harbor Water & Sewer District

Is Southwest Harbor Water & Sewer District tap water safe to drink?

EPA monitoring detected 13 contaminants in Southwest Harbor Water & Sewer 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 Southwest Harbor Water & Sewer District's water?

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

How many people does Southwest Harbor Water & Sewer District serve?

Southwest Harbor Water & Sewer District reports serving 2,480 people in Maine, per its EPA record.

Has Southwest Harbor Water & Sewer District had any water quality violations?

The EPA has 529 violations on file for Southwest Harbor Water & Sewer District, of which 426 are health-based (a contaminant limit or required treatment was breached) and 1 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.