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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
EPA records for SOUTHWEST METROPOLITAN WSD • Updated September 2026
Compliance record only — no recent sampling data
SOUTHWEST METROPOLITAN WSD has an EPA compliance record but no recent lead, PFAS or contaminant sampling results in the federal datasets we use, so the grade below reflects compliance history only.
Littleton's water system (SOUTHWEST METROPOLITAN WSD) has no health-based EPA violations in the last five years, but EPA's datasets hold no recent lead, PFAS or contaminant sampling for it, so we show a compliance-only grade of A.
SOUTHWEST METROPOLITAN WSD has no health-based EPA violations in the last five years, which is the only recent evidence EPA holds for it; we grade it A on compliance alone. Ask the utility for its Consumer Confidence Report for sampling results.
SOUTHWEST METROPOLITAN WSD's most recent Lead and Copper Rule result (2002-01-01 to 2002-12-31) was 9 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
SOUTHWEST METROPOLITAN WSD has no UCMR5 PFAS results in EPA's dataset; systems serving under 3,300 people were only sampled if selected. Ask your utility whether it has tested for PFAS.
No. EPA's SDWIS shows no violations of any kind for SOUTHWEST METROPOLITAN WSD since 2016.
SOUTHWEST METROPOLITAN WSD reports purchased surface water as its primary source and serves about 48,648 people (EPA PWSID CO0103723).
Not on the strength of EPA's data for SOUTHWEST METROPOLITAN WSD. A filter still helps with taste and with lead from your own plumbing, which no city-level test can measure.
Want to know what's really in your Littleton tap water?
EPA data describes water leaving the plant — a certified mail-in lab test shows what reaches your own faucet, including lead from household plumbing.
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SOUTHWEST METROPOLITAN WSD · SDWIS records since 2016 · 5-year window starts 2021-09-07
EPA records no health-based violations for this system in the last five years.
No violations of any kind on file since 2016.
Source: ECHO SDWA bulk download (SDWA_VIOLATIONS_ENFORCEMENT.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
EPA Lead and Copper Rule 90th-percentile results reported by SOUTHWEST METROPOLITAN WSD
Below the action level, but detectable. In the most recent monitoring period on file (2002-01-01 to 2002-12-31), 90% of the homes SOUTHWEST METROPOLITAN WSD sampled had lead at or below 9 ppb. This result is from before 2020, so it is shown for context but not scored.
EPA's action level is 15 ppb (dropping to 10 ppb under the 2024 Lead and Copper Rule Improvements). There is no safe level of lead; the 90th-percentile figure describes the system, not your tap — homes with lead service lines or pre-1986 plumbing can be higher.
| Monitoring period | Lead 90th percentile | vs 15 ppb action level |
|---|---|---|
| 2002-01-01 → 2002-12-31 | 9 ppb | Below the action level, but detectable |
| 2001-01-01 → 2001-12-31 | 7 ppb | Below the action level, but detectable |
| 2000-01-01 → 2000-12-31 | 8 ppb | Below the action level, but detectable |
Source: ECHO SDWA bulk download (SDWA_LCR_SAMPLES.csv, SDWIS 2026Q2, file dated 2026-07-09, fetched 2026-09-06)
SOUTHWEST METROPOLITAN WSD has no results in EPA's UCMR5 PFAS dataset (2023–2026). Systems serving fewer than 3,300 people were sampled only if selected, so this is a data gap, not a clean result. About PFAS →
SOUTHWEST METROPOLITAN WSD · 0 service lines inventoried · Q2 2026 snapshot
SOUTHWEST METROPOLITAN WSD has not yet submitted a complete service line inventory to EPA, so the number of lead service lines in Littleton is not publicly known.
Source: EPA SDWIS Service Line Inventory (Q2 2026) · PWS ID CO0103723 · See all Colorado lead service lines. We may earn a commission from filters and test kits, at no extra cost to you.
Surface-water systems draw from rivers, lakes or reservoirs and must filter and disinfect, which is why disinfection byproducts (TTHM, HAA5) are the readings to watch.
How to test your tap water and the treatment options that actually fit Littleton homes
The most reliable way to know what is actually coming out of your tap is a certified mail-in lab test. City-wide EPA data (like the report above) reflects the water leaving the treatment plant, but contaminants such as lead and copper can be picked up from your own service line and household plumbing — so the water at your Littleton faucet can differ from the system average. A state-certified lab measures dozens of contaminants at once with results you can trust; you can also find one near you through the EPA's certified-lab list at epa.gov/dwlabcert. Hardware-store test strips are cheaper and instant, but they only screen for a few basics (chlorine, hardness, pH, and a rough lead pass/fail) and are far less accurate — treat them as a first look, not a diagnosis.
Match the treatment to what your test finds. Reverse osmosis (RO) removes the widest range of contaminants — lead, arsenic, nitrate, PFAS, and dissolved solids — which makes an under-sink reverse osmosis system the most thorough choice for Littleton households with heavy-metal or PFAS concerns. If your main issue is taste, odor, or chlorine, an activated carbon filter (pitcher, faucet, or under-sink) is simpler and cheaper and handles chlorine and many organic compounds well, though carbon alone does not remove arsenic, nitrate, or most PFAS. NSF-certified pitchers rated for lead reduction are the easiest way to start today while you decide on a permanent setup.
We may earn a commission from testing kits and filters purchased through these links, at no extra cost to you.
Littleton ranks #1 of 35 graded Colorado cities.
SOUTHWEST METROPOLITAN WSD has no health-based EPA violations in the last five years, which is the only recent evidence EPA holds for it; we grade it A on compliance alone. Ask the utility for its Consumer Confidence Report for sampling results.
SOUTHWEST METROPOLITAN WSD's most recent Lead and Copper Rule result (2002-01-01 to 2002-12-31) was 9 ppb at the 90th percentile, below EPA's 15 ppb action level. Because lead usually comes from service lines and household plumbing, homes built before 1986 should still test at the tap.
SOUTHWEST METROPOLITAN WSD has no UCMR5 PFAS results in EPA's dataset; systems serving under 3,300 people were only sampled if selected. Ask your utility whether it has tested for PFAS.
No. EPA's SDWIS shows no violations of any kind for SOUTHWEST METROPOLITAN WSD since 2016.
SOUTHWEST METROPOLITAN WSD reports purchased surface water as its primary source and serves about 48,648 people (EPA PWSID CO0103723).
Not on the strength of EPA's data for SOUTHWEST METROPOLITAN WSD. A filter still helps with taste and with lead from your own plumbing, which no city-level test can measure.
Even with good water quality, a filter removes trace contaminants and improves taste.
For Everyday Peace of Mind
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