Water system
Sienna MUD 10
What this means for you
- Is it safe to drink right now?
- Based on the latest EPA data, Sienna MUD 10 has no unresolved health-based violations from the past year. Water that meets federal standards is generally considered safe to drink for most healthy people.
- Should I use a filter?
- Optional. Nothing in this data strongly calls for one. Many people still filter for chlorine taste and odor.
- What kind of filter?
- For taste and odor (chlorine/chloramine), an NSF/ANSI 42 pitcher or faucet filter is enough. See matched standards and product picks.
This is general information from public EPA data, not medical advice. Lead often comes from a home’s own pipes, so only a test of your tap can tell your exposure. If you are pregnant, caring for an infant, or have a weakened immune system, ask your doctor or health department.
PFAS (“forever chemicals”), EPA UCMR 5
| Chemical | Highest location average | Highest single sample | Federal limit | Detections/samples |
|---|---|---|---|---|
| PFPeA | 109.9 ppt | 194 ppt | none | 2/2 |
| PFBS | 1.9 ppt | 3.7 ppt | none | 1/2 |
| PFHxA | 2.9 ppt | 5.7 ppt | none | 1/2 |
| PFBA | 4.8 ppt | 9.6 ppt | none | 1/2 |
5 PFAS tested and not detected
PFOS, PFOA, PFNA, PFHxS, HFPO-DA (2 samples each, below EPA minimum reporting levels).
Hazard Index (PFHxS, PFNA, GenX, PFBS): 0 (limit 1.0, proposed for repeal).
Averages are per sampling location across UCMR 5 samples (non-detects counted as 0), approximating the rule’s running annual average. Not an official compliance determination; PFOA/PFOS MCL compliance begins April 26, 2029.
Lithium (also tested in UCMR 5, not a PFAS; no federal limit): highest location average 19 ppb.
Lead and copper
Violations (last 5 years)
| Began | Type | Contaminant / rule | Status |
|---|---|---|---|
| 2025-11-01 | Missed or late testing | Revised Total Coliform Rule | Resolved |
Filters matched to this water
Look for filters certified (NSF, IAPMO or WQA) to these standards for the specific contaminant. Buttons open the maker’s page or an Amazon search; use “Check NSF listing” to verify a model’s claims. No affiliate links yet — grades are never sold.
Chlorine/chloramine taste
NSF/ANSI 42Annual water quality report
Utilities must publish a Consumer Confidence Report every year by July 1. Find it on the utility’s website or ask them directly; EPA explains how.