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Tap water quality report

Rochester Water Dept

EPA monitoring tested this supplier for 107 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

107
contaminants tested
16
detected
25,000
people served
34
health-based violations
New Hampshire rankingsLead in New HampshirePFAS in New Hampshire
Water source
Surface water
Ownership
Local government
Counties served
Strafford

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.

34
health-based violations
41
violations on file
2
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2022-01-01 → 2022-03-31
MCL Health-based Resolved 2022-01-01 → 2022-03-31
MCL Health-based Resolved 2022-01-01 → 2022-03-31
MCL Health-based Resolved 2022-01-01 → 2022-03-31
MCL Health-based Resolved 2016-10-01 → 2016-12-31
MCL Health-based Resolved 2016-10-01 → 2016-12-31
MCL Health-based Resolved 2016-10-01 → 2016-12-31
MCL Health-based Resolved 2016-10-01 → 2016-12-31
MCL Health-based Resolved 2016-07-01 → 2016-09-30
MCL Health-based Resolved 2016-07-01 → 2016-09-30

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
Chloroform
98.6 µg/L
No EPA limit set
worst single sample: 160 µg/L
203/211 SYR4 2014–2019
TTHM
110 µg/L 138%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 170 µg/L
203/211 SYR4 2014–2019
Bromodichloromethane
11 µg/L
No EPA limit set
worst single sample: 14 µg/L
200/212 SYR4 2014–2019
Dichloroacetic Acid
32 µg/L
No EPA limit set
worst single sample: 40 µg/L
171/203 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
71.55 µg/L 119%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 84.7 µg/L
171/203 SYR4 2014–2019
Trichloroacetic Acid
41 µg/L
No EPA limit set
worst single sample: 50 µg/L
166/203 SYR4 2014–2019
Dibromochloromethane
1.58 µg/L
No EPA limit set
worst single sample: 2.5 µg/L
136/213 SYR4 2014–2019
Copper
186.5 µg/L 14%
of the EPA limit 1300 µg/L
worst single sample: 402.413 µg/L
71/73 SYR4 2014–2019
Monochloroacetic Acid
6.9888 µg/L
No EPA limit set
worst single sample: 9.121 µg/L
15/206 SYR4 2014–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Lead
10.3434 µg/L 69%
of the EPA limit 15 µg/L
worst single sample: 19.0449 µg/L
13/65 SYR4 2014–2017
Barium
10.305 µg/L 0.5%
of the EPA limit 2000 µg/L
worst single sample: 10.9 µg/L
8/8 SYR4 2015–2019
Fluoride
842 µg/L 21%
of the EPA limit 4000 µg/L
worst single sample: 850 µg/L
5/8 SYR4 2015–2019
Bromoform
0.5000 µg/L
No EPA limit set
 1/216 SYR4 2014–2019
Combined Radium (-226 And -228)
0.6000 pCi/L 12%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
Gross Alpha, Excl. Radon And U
0.6000 pCi/L 4%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
91 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitrateNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
IAN ROHRBACHER

Frequently asked questions about Rochester Water Dept

Is Rochester Water Dept tap water safe to drink?

EPA monitoring detected 16 contaminants in Rochester Water Dept'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 Rochester Water Dept's water?

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

How many people does Rochester Water Dept serve?

Rochester Water Dept reports serving 25,000 people in New Hampshire, per its EPA record.

Has Rochester Water Dept had any water quality violations?

The EPA has 41 violations on file for Rochester Water Dept, of which 34 are health-based (a contaminant limit or required treatment was breached) and 2 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.