Compliance record
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHXS | 0.0039 µg/L | 2/60 | 2024 |
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.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 971.2 µg/L 75% of the EPA limit 1300 µg/L
worst single sample: 1710 µg/L | 150/150 | SYR4 | 2013–2019 |
| Lead | 9.165 µg/L 61% of the EPA limit 15 µg/L
worst single sample: 111 µg/L | 124/150 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 710 µg/L 7.1% of the EPA limit 10000 µg/L
worst single sample: 770 µg/L | 92/496 | SYR4 | 2012–2019 |
| Chloroform | 9.18 µg/L No EPA limit set
worst single sample: 14 µg/L | 85/189 | SYR4 | 2012–2019 |
| Bromodichloromethane | 3.97 µg/L No EPA limit set
worst single sample: 4.3 µg/L | 84/189 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 3.455 µg/L No EPA limit set
worst single sample: 6.4 µg/L | 70/84 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 9.52 pCi/L 63% of the EPA limit 15 pCi/L
worst single sample: 13 pCi/L | 57/78 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.2 µg/L No EPA limit set
worst single sample: 2.4 µg/L | 55/189 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 1.8 µg/L No EPA limit set
worst single sample: 2 µg/L | 49/84 | SYR4 | 2012–2019 |
| Barium | 88.25 µg/L 4.4% of the EPA limit 2000 µg/L
worst single sample: 105 µg/L | 35/36 | SYR4 | 2012–2019 |
| Fluoride | 1240 µg/L 31% of the EPA limit 4000 µg/L
worst single sample: 1300 µg/L | 33/34 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 0.8300 µg/L 17% of the EPA limit 5 µg/L
worst single sample: 1.5 µg/L | 22/83 | SYR4 | 2012–2019 |
| Lead | 0.0070 mg/L 47% of the EPA limit 0.0150 mg/L | 15/15 | LCR | 2025 |
| Chromium | 0.3140 µg/L 0.3% of the EPA limit 100 µg/L
worst single sample: 0.3300 µg/L | 9/54 | SYR4 | 2012–2019 |
| Trichloroethylene | 0.4340 µg/L 8.7% of the EPA limit 5 µg/L
worst single sample: 0.5700 µg/L | 9/83 | SYR4 | 2012–2019 |
| Lithium | 10.8 µg/L No EPA limit set | 2/60 | UCMR-5 | 2024 |
| Cyanide | 120 µg/L 60% of the EPA limit 200 µg/L | 1/34 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1 µg/L No EPA limit set | 1/84 | SYR4 | 2012–2019 |
| Toluene | 0.2400 µg/L 0% of the EPA limit 1000 µg/L | 1/83 | SYR4 | 2012–2019 |
82 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, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalToxapheneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Rochester
Is Rochester tap water safe to drink?
EPA monitoring detected 20 contaminants in Rochester'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's water?
EPA monitoring detected Copper, Lead, Nitrate-Nitrite, Chloroform, Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does Rochester serve?
Rochester reports serving 123,624 people in Minnesota, per its EPA record.
Has Rochester had any water quality violations?
The EPA has no formal drinking-water violations on file for Rochester.
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.