Is Willow Oak, FL tap water safe?
The short answer
2 of the 5 utilities serving Willow Oak have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Florida’s records: City of Mulberry and G ; H Mobile Home Park Inc.
Southwest/Polk County Utility, which serves the most people here, has 3 results above the health goal. The worst: Arsenic at 1.5 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Willow Oak’s ZIP codes, from EPA’s estimates.
- Open report
Southwest/Polk County Utility
Florida · serves 39,209 people · about 420 in Willow Oak
3 results above the health goal. The worst: Arsenic at 1.5 ppb, above the health goal.
No health-based violations since 2016
- Open report
City of Lakeland
Florida · serves 193,297 people · about 170 in Willow Oak
3 results above the health goal. The worst: Lead at 0.6 ppb, above the health goal.
No health-based violations since 2016
- Open report
City of Mulberry
Florida · serves 3,780 people · about 130 in Willow Oak
2 results above the health goal. The worst: Lead at 3.0 ppb, above the health goal.
2 health-based violations since 2016
- Open report
Spring Hill MHP
Florida · serves 764 people · under 100 in Willow Oak
1 result above the health goal. The worst: Lead at 1.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
G ; H Mobile Home Park Inc
Florida · serves 80 people · under 100 in Willow Oak
1 result above the legal limit and 1 result above the health goal. The worst: Arsenic at 79 ppb, above the legal limit.
3 health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Southwest/Polk County Utility’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Willow Oak
The 3 labs Florida certifies closest to Willow Oak, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Benchmark Mid Florida Laboratory
Winter Haven, FL · about 16 miles
Certified for bacteria
Advanced Environmental Laboratories, Inc. - Tampa
Tampa, FL · about 22 miles
Certified for bacteria, lead and copper, minerals and other inorganics, organic chemicals, disinfection byproducts
Hillsborough County Environmental Laboratory
Tampa, FL · about 22 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics
Florida Department of Health Bureau of Public Health Laboratories: Coliform and E. coli testing for private wells at the Jacksonville and Miami labs. Collection kits come from your county health department, and the sample has to reach the lab on ice the same day it is collected. $40 for private testing through the state lab. Well Water Testing, Florida Department of Health.
All 212 certified labs for FloridaWhich ZIP codes are in Willow Oak: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Florida Department of Health Environmental Laboratory Certification Program, drinking water labs, as listed in TNI LAMS; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Willow Oak
Other towns in Polk County with a page of their own.
What to do next
- Read Southwest/Polk County Utility’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water