No health-based violations on EPA record since 2016.
Serves about 31,000 people (3,951 connections) with groundwater from its own wells, and buys water from East Cherry Creek Valley WSD, Cottonwood WSD, East Valley MD and 1 more.
From EPA's record for CO0203002. PurityMap is independent of Arapahoe Cnty WWWA.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2023 to January 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 23.2 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorooctanoic acid (PFOA) | 4.6 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorobutanesulfonic acid (PFBS) | 6.1 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorohexanoic acid (PFHxA) | 6.8 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorobutanoic acid (PFBA) | 5.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoropentanoic acid (PFPeA) | 7.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2024-01-10 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2024-01-10 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2024-01-10 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2024-01-10 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-08 to 2023-08-02 | UCMR5 Analytical Results: ARAPAHOE CNTY WWWA (CO0203002) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →Arapahoe Cnty WWWA's phone number on EPA record is 303-790-4830. Its mailing address is 7135 S TUCSON WAY, CENTENNIAL, CO 80112.
According to EPA's record, Arapahoe Cnty WWWA uses groundwater from its own wells, and buys water from East Cherry Creek Valley WSD, Cottonwood WSD, East Valley MD and 1 more.
No health-based violations on EPA record since 2016. EPA also lists 169 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Arapahoe Cnty WWWA's latest lead and copper round, which ended in December 2025, was 1.1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Arapahoe Cnty WWWA. Its phone number on EPA record is 303-790-4830. Its mailing address on EPA record is 7135 S TUCSON WAY, CENTENNIAL, CO 80112. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.