Sharyland Water Supply Corporation water quality
Mission, TX · serves 68,562 people (22,854 connections) · Surface water · Local government · EPA ID TX1080033
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data.
- PFAS
- Detected, below limit8 of 29 PFAS found at least once. All averages below the federal limits.
- Lithium
- Above screening levelHighest result 41.3 ppb. EPA uses 10 ppb to decide what to study further. It is not a health limit, and there is no federal limit for lithium. About 1 in 4 systems tested were above it.
- Lead
- Below action level1 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 Jun 2024. Your home's pipes can make yours higher.
- Violations
- Resolved1 health-based violation since 2016, most recently Jan 2019.
- 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.
- Want to reduce what was found? Filters for these results.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Sharyland Water Supply Corporation'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 (956) 585-6081. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 3 entry points tested Jul 2024 to Oct 2025. "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 One sample above limit Limit 4 ppt | 1.07 ppt 27% of the limit |
| PFOS One sample above limit Limit 4 ppt | 2.93 ppt 73% of the limit |
| PFHxS Detected, below limit Limit 10 ppt | 2.45 ppt 25% of the limit |
| 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) Detected, below limit Limit 1 | 0.25 |
| PFBS Detected, below limit Guideline 2,000 ppt | 0.75 ppt |
| PFBA Detected, below limit Guideline 6,000 ppt | 7.05 ppt |
| PFHxA Detected, below limit Guideline 3,000 ppt | 6 ppt |
| PFPeA Detected, no limit | 6.33 ppt |
| PFHpA Detected, no limit | 1.88 ppt |
29 PFAS tested, 8 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
Detected in 12 of 12 samples. Highest result 41.3 ppb. EPA's non-enforceable screening level is 10 ppb. Above screening level The screening level is how EPA decides what to study further, not a health limit. There is no federal limit for lithium and no filter is certified to remove it. About lithium.
Lead and copper
Latest 90th percentile: 1 ppb lead (Jan 2024 – Jun 2024). Below action level
Highest since 2016: 1.4 ppb (Dec 2020).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2024 – Jun 2024 | 1 ppb |
| Jul 2023 – Dec 2023 | 1.33 ppb |
| Jan 2018 – Dec 2020 | 1.4 ppb |
Earlier results (9)
| Jul 2017 – Dec 2017 | 0 ppb |
| Jan 2017 – Jun 2017 | 0 ppb |
| Jan 2014 – Dec 2016 | 1 ppb |
| Jan 2011 – Dec 2013 | 0 ppb |
| Jan 2008 – Dec 2010 | 0.088 ppb |
| Jan 2005 – Dec 2007 | 1.3 ppb |
| Jan 1999 – Dec 2001 | 0.3 ppb |
| Jan 1996 – Dec 1998 | 0.8 ppb |
| Jan 1995 – Dec 1995 | 1 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 |
|---|---|
| Jan 2019 | The running annual average for Chlorite was above the legal limit. EPA record: Chlorite · Maximum Contaminant Level Violation, Average · measured 1.4 mg/l (limit 1.0 mg/L) Resolved |
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 | 14.3 ppb | 300 ppb |
| Chlorate | 560 ppb | 210 ppb |
| Vanadium | 5.42 ppb | 21 ppb |
| Molybdenum | 6.83 ppb | 40 ppb |
| Strontium | 1.46 ppm | 1.5 ppm |
Where it serves
ZIP codes the system reported serving: 78501, 78502, 78503, 78504, 78505, 78539, 78540, 78541, 78542, 78563, 78572, 78573, 78574
Nearby utilities
- Agua Special Utility District Mission · same area
- City of Mission Mission · same area
- McAllen Public Utility McAllen · 5 mi
- City of Pharr Pharr · 9 mi
- City of Edinburg Edinburg · 13 mi
- North Alamo Water Supply Corporation Weslaco · 21 mi
Questions
Is Sharyland Water Supply Corporation water safe to drink?
Sharyland Water Supply Corporation 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 Sharyland Water Supply Corporation water have PFAS?
Yes. EPA's 2023–2025 testing of Sharyland Water Supply Corporation found 8 PFAS at least once. None of the averages were above the federal limits.
What is the lead level in Sharyland Water Supply Corporation water?
The most recent 90th-percentile lead result for Sharyland Water Supply Corporation is 1 ppb, for the period ending Jun 2024. 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 TX1080033: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID TX1080033).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Sharyland Water Supply Corporation at (956) 585-6081, 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.