Water Quality Report · Updated October 07, 2026
Lakeville
Lakeville delivers tap water graded B (75/100) by TapWaterSafety.org. The utility serves approximately 67,300 residents in Lakeville, Minnesota using groundwater. The most significant water quality concerns are: PFAS contamination; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Radium, combined (-226 and -228) significantly above health guideline. For questions, the utility can be reached at 9529854400.
Is Lakeville tap water safe to drink?
Lakeville delivers tap water that earns a grade of B (75/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 67,300 residents in Lakeville, drawing from groundwater.
Public testing data identifies 10 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Radium, combined (-226 and -228), Bromodichloromethane, Haloacetic acids (HAA5), Perfluorohexane sulfonate (PFHXS), Trichloroacetic acid, Chloroform, Dibromochloromethane, Dichloroacetic acid. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for Lakeville (system ID MN1190015) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for Lakeville residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for Lakeville.
PFAS contamination
Severe concernPerfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 7.39 ppb, 123x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 17.1 ppb, 114x above the EWG health guideline of 0.15 ppb.
Radium, combined (-226 and -228) significantly above health guideline
Moderate concernRadium, combined (-226 and -228) detected at 3.96 pCi/L, 79x above the EWG health guideline of 0.05 pCi/L.
Contact Lakeville
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for Lakeville
Filters matched to the specific contaminants in this water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for radium (NSF/ANSI 58)
$429-$750RO certified for radium 226/228 reduces it; ion-exchange water softeners also reduce radium.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 75/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
7.39 ppb | 0.06 | — | — | — | — | — | 123× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
17.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 114× over |
| Radium, combined (-226 and -228) Radiological |
3.96 pCi/L | 0.05 | 5.0 | — | — | — | — | 79× over |
| Bromodichloromethane Disinfection byproduct |
4.07 ppb | 0.06 | — | — | — | — | — | 68× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
6.13 ppb | 0.1 | 60.0 | 60 | — | — | — | 61× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.046 ppt | 0.001 | 10.0 | — | — | — | — | 46× over |
| Trichloroacetic acid Disinfection byproduct |
3.38 ppb | 0.1 | — | — | — | — | — | 34× over |
| Chloroform Disinfection byproduct |
11.6 ppb | 0.4 | — | — | — | — | — | 29× over |
| Dibromochloromethane Disinfection byproduct |
1.45 ppb | 0.1 | — | — | — | — | — | 15× over |
| Dichloroacetic acid Disinfection byproduct |
2.75 ppb | 0.2 | — | — | — | — | — | 14× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.062 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | Below guideline |
| Manganese Heavy metal |
1.02 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
2.91 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.163 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.035 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.703 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
Lakeville service area
This water system serves 1 community in Dakota County, Minnesota. Click any city for its dedicated tap water quality page.
Find the right filter for Lakeville water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.