Tap Water Results

Is Horn Lake, MS tap water safe?

Data: U.S. EPA · How we read the data · How we check it

Summary

No federal limits exceeded in EPA data for City of Horn Lake.

3 public water systems serve parts of Horn Lake. The largest, City of Horn Lake, serves 13,649 people. Your water bill names your system.

Largest system

City of Horn Lake

13,649 people · Groundwater · EPA ID MS0170022

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 1.2 ppb at the 90th percentile (Dec 2024, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Across Mississippi, 5 of 235 water systems EPA tested had PFAS above a 2024 federal limit, and 10 systems were above the lead action level in results from the last five years. Mississippi results.

Horn Lake homes and lead pipes

23%
of homes built before 1980 (Mississippi 42%, US 50%)
2%
built before 1950 (Mississippi 7%)
42%
of households rent (Mississippi 30%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Horn Lake city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Horn Lake

  • Horn Lake Water Association
    12,735 people · Groundwater · Mississippi · reported ZIPs here
    No PFAS above limits
  • Walls Water Association – Lake Forest
    9,298 people · Groundwater · Mississippi · reported ZIPs here
    No PFAS above limits

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Southaven 4 mi
City of Southaven
City of SouthavenNone above limits0 ppb
Olive Branch 12 mi
City of Olive Branch
City of Olive BranchNone above limits0.9 ppb
Oxford 51 mi
City of Oxford
City of OxfordAbove limit0 ppb
Tupelo 88 mi
City of Tupelo
City of TupeloNone above limits0 ppb
Greenville 122 mi
City of Greenville
City of GreenvilleNone above limits1.1 ppb
Starkville 124 mi
City of Starkville
City of StarkvilleNone above limits1.7 ppb
Horn Lake ZIP codes (1)
  • 38637

Questions

Is Horn Lake tap water safe to drink?

City of Horn Lake has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Horn Lake, MS?

3 public water systems serve parts of Horn Lake. The largest is City of Horn Lake (13,649 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Horn Lake tap water have PFAS?

None detected above EPA's reporting limits. City of Horn Lake had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Horn Lake homes have lead pipes?

Census estimates put 23% of Horn Lake homes as built before 1980 (Mississippi: 42%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. City of Horn Lake's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.