South Blount Utility District water quality
Maryville, TN · serves 53,864 people (21,290 connections) · Surface water · Local government · EPA ID TN0000643
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data.
- PFAS
- Not detectedNone of 29 PFAS found above EPA's reporting limits in 4 samples (2023–2025).
- Lead
- Below action level4.01 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Dec 2025. Your home's pipes can make yours higher.
- Violations
- Resolved1 health-based violation since 2016, most recently May 2025. One required an urgent public notice within 24 hours (the kind behind boil-water notices), most recently May 2025. What to do if you get a notice.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Got a boil-water or do-not-drink notice? What each notice means and what to do.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read South Blount Utility District's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (865) 982-3560. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 1 entry point tested Feb 2024 to Nov 2024. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Not detected Limit 4 ppt | – |
| PFOS Not detected Limit 4 ppt | – |
| PFHxS Not detected Limit 10 ppt | – |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Not detected Limit 1 | – |
| PFBS Not detected Guideline 2,000 ppt | – |
| PFBA Not detected Guideline 6,000 ppt | – |
| PFHxA Not detected Guideline 3,000 ppt | – |
29 PFAS tested, 0 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Not detected in 4 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 4.01 ppb lead (Jan 2023 – Dec 2025). Below action level
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2023 – Dec 2025 | 4.01 ppb |
| Jan 2020 – Dec 2022 | 2.5 ppb |
| Jan 2017 – Dec 2019 | 1.7 ppb |
Earlier results (9)
| Jan 2014 – Dec 2016 | 1.7 ppb |
| Jan 2011 – Dec 2011 | 12 ppb |
| Jul 2010 – Dec 2010 | 10 ppb |
| Jan 2010 – Jun 2010 | 12.3 ppb |
| Jul 2009 – Dec 2009 | 22 ppb |
| Jan 2009 – Jun 2009 | 36 ppb |
| Jul 2008 – Dec 2008 | 21.6 ppb |
| Jan 2008 – Jun 2008 | 75 ppb |
| Jul 2007 – Dec 2007 | 53 ppb |
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
| When | What happened |
|---|---|
| May 2025 | E. coli was confirmed in the water. E. coli means the water may have been contaminated with sewage or animal waste. Urgent public notice required What that means EPA record: Revised Total Coliform Rule · Maximum Contaminant Level Violation, E. coli (RTCR) Resolved |
1 unresolved monitoring or reporting violation: Consumer Confidence Rule.
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 20.9 ppb | 300 ppb |
| Strontium | 0.025 ppm | 1.5 ppm |
| Vanadium | 0.3 ppb | 21 ppb |
| Chromium-6 | 0.37 ppb | – |
| Chlorate | 390 ppb | 210 ppb |
Where it serves
ZIP codes the system reported serving: 37737, 37742, 37777, 37801, 37803, 37804
Nearby utilities
- City of Maryville Water & Sewer Dept Maryville · same area
- First Utility District of Knox County Knoxville · 16 mi
- Hallsdale-Powell Utility District Knoxville · 16 mi
- Knoxville Utilities Board – KUB Knoxville · 16 mi
- West Knox Utility District Knoxville · 16 mi
- Cleveland Utilities Cleveland · 63 mi
Questions
Is South Blount Utility District water safe to drink?
South Blount Utility District had 1 health-based violation since 2016, all since resolved. EPA testing found no PFAS above the federal limits. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does South Blount Utility District water have PFAS?
EPA tested South Blount Utility District for 29 PFAS between Feb 2024 and Nov 2024 and none were detected above the reporting limits (about 2 to 20 ppt depending on the chemical).
What is the lead level in South Blount Utility District water?
The most recent 90th-percentile lead result for South Blount Utility District is 4.01 ppb, for the period ending Dec 2025. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for TN0000643: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID TN0000643).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask South Blount Utility District at (865) 982-3560, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.