Anoka County Water Quality: 3 Cities Ranked by the Records

Name: Anoka County Water Quality Data (2026)
Creator: PurityMap
License: https://creativecommons.org/licenses/by/4.0/

Anoka County, Minnesota: 3 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my system Open on the map Private wells in Anoka County

Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

LithiumDetected in 2 systems of 3 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest18.4 µg/L

Anoka18.4 µg/LSample date: 2024-07-16 to 2025-05-22
Andover9.6 µg/LSample date: 2024-05-13 to 2024-11-25
Forest LakeNot detected · below 9.0 µg/L lab reporting limitSample date: 2023-08-02 to 2024-06-17

Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 3 tested10 ng/L federal MCL (2024) · US EPAHighest11.4 ng/L

Anoka11.4 ng/LSample date: 2024-07-16 to 2025-05-22
AndoverNot detected · below 3.0 ng/L lab reporting limitSample date: 2024-05-13 to 2024-11-25
Forest LakeNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-08-02 to 2024-06-17

Lead (90th percentile)Detected in 2 systems of 3 tested15 µg/L federal action level · US EPAHighest2 µg/L

Anoka2 µg/LMonitoring period: 2023–2025
Forest Lake2 µg/LMonitoring period: 2023–2025
AndoverNot detectedMonitoring period: 2026–2026 (still open)

Perfluorobutanoic acid (PFBA)Detected in 2 systems of 3 testedNo federal or state limit; shown for transparencyHighest14.9 ng/L

Anoka14.9 ng/LSample date: 2024-07-16 to 2025-05-22
Andover11.1 ng/LSample date: 2024-05-13 to 2024-11-25
Forest LakeNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-08-02 to 2024-06-17

27 PFAS tested, none detected in any systemShow

Tested in these 3 systems: Andover, Anoka, Forest Lake

11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorodecanoic acid (PFDA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanoic acid (PFHxA)
Perfluorononanoic acid (PFNA)
Perfluorooctanesulfonic acid (PFOS)
Perfluorooctanoic acid (PFOA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)

3 cities

Cities ranked by the records

1
AndoverAndover
PFAS detected, within limit
Open city report →
2
Forest LakeForest Lake
No PFAS detectedLead below action level
Open city report →
3
AnokaAnoka
PFAS sample above a limitLead below action level
Open city report →

Showing 3 of 3 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Anoka County1 of 3 city reports had a PFAS sample above a 2024 EPA limit

4.0 ng/L federal MCL · PFOS, ng/LPFAS in Minnesota

Lead

0of 3 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Minnesota

Who supplies the county

Largest water systems

AndoverAndover · MN1020034
21,455 served
AnokaAnoka · MN1020001
17,798 served
Forest LakeForest Lake · MN1820005
11,800 served

Questions

Frequently asked

How does Anoka County tap water compare across cities?

PurityMap ranks 3 cities in Anoka County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Andover's main water system: Andover · PWSID MN1020034 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Anoka County cities had a PFAS sample above a 2024 EPA limit?

1 of 3 Anoka County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Anoka (PFHxS 11.4 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 2.

Is there lead in Anoka County tap water?

Utilities report lead as a 90th-percentile result from home taps. 2 of 3 Anoka County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Next step

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