Community Water System · PWSID CO0107496

Lyons Town of

Serves 2,990 peopleSurface Water PurchasedOwner: Local GovernmentLyons, Colorado
Nothing open right now.

On record since 1997: 3 violations. 3 treatment lapses. Most recent began 1999-01-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

0Over the limit
3Treatment lapse
0Missed or late test
0Notice or report

More violations on record than 34% of active water systems in Colorado. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

1997 · Treatment lapse: 11998 · Treatment lapse: 11999 · Treatment lapse: 1200020052010201520202025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
100% treatment lapse · 3

Across Colorado, 74% of violations are missed or late tests and 6% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 7 results on file · action level 15 ppb

6 ppb
3 ppb
2 ppb
2 ppb
1 ppb
1 ppb
0 ppb

Every violation on record

  1. 1999-01-01Lead and Copper RuleOCCT/SOWT Treatment Installation/DemonstrationBack in compliance
  2. 1998-01-01Lead and Copper RuleOCCT/SOWT Treatment Installation/DemonstrationBack in compliance
  3. 1997-01-01Lead and Copper RulePublic EducationBack in compliance

System details

Population served2,990
Service connections962
Water sourceSurface Water Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityLyons
EPA ZIP on file80540

Areas served

  • Boulder County

Reading this record

Lyons Town of is a community water system that draws from surface water purchased and serves about 2,990 people in Lyons, Colorado. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.