Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
0
health-based violations
518
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| Other | Monitoring | Resolved | 2019-07-01 |
| Other | Monitoring | Resolved | 2019-07-01 |
| Other | Monitoring | Resolved | 2019-07-01 |
| MR | Monitoring | Resolved | 2017-01-01 → 2019-12-31 |
| MR | Monitoring | Resolved | 2017-01-01 → 2019-12-31 |
| MR | Monitoring | Resolved | 2017-01-01 → 2019-12-31 |
| MR | Monitoring | Resolved | 2017-01-01 → 2019-12-31 |
| MR | Monitoring | Resolved | 2017-01-01 → 2019-12-31 |
| MR | Monitoring | Resolved | 2017-01-01 → 2019-12-31 |
| MR | Monitoring | Resolved | 2017-01-01 → 2019-12-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 49.405 µg/L 62% of the EPA limit 80 µg/L
worst single sample: 59.1 µg/L | 90/98 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 12.026 µg/L 20% of the EPA limit 60 µg/L
worst single sample: 12.8 µg/L | 77/92 | SYR4 | 2012–2019 |
| Nitrate | 1830 µg/L 18% of the EPA limit 10000 µg/L
worst single sample: 3900 µg/L | 50/118 | SYR4 | 2012–2019 |
| Lead | 0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L | 31/31 | LCR | 2025 |
| Barium | 291.1 µg/L 15% of the EPA limit 2000 µg/L
worst single sample: 312 µg/L | 20/20 | SYR4 | 2012–2019 |
| Fluoride | 1310 µg/L 33% of the EPA limit 4000 µg/L
worst single sample: 1500 µg/L | 20/20 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 10.2768 pCi/L 69% of the EPA limit 15 pCi/L
worst single sample: 11.707 pCi/L | 16/16 | SYR4 | 2012–2019 |
| Bromoform | 18.36 µg/L No EPA limit set
worst single sample: 33.2 µg/L | 15/23 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 5.05 pCi/L 101% of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 5.4 pCi/L | 15/15 | SYR4 | 2012–2019 |
| Dibromochloromethane | 17.04 µg/L No EPA limit set
worst single sample: 19 µg/L | 15/23 | SYR4 | 2012–2019 |
| Lithium | 23.2 µg/L No EPA limit set | 14/14 | UCMR-5 | 2023 |
| Bromodichloromethane | 9.96 µg/L No EPA limit set
worst single sample: 12 µg/L | 13/23 | SYR4 | 2012–2019 |
| Chloroform | 7.57 µg/L No EPA limit set
worst single sample: 7.9 µg/L | 12/23 | SYR4 | 2012–2019 |
| Combined Uranium | 15 µg/L 50% of the EPA limit 30 µg/L | 11/15 | SYR4 | 2012–2019 |
| Antimony, Total | 1.167 µg/L 19% of the EPA limit 6 µg/L
worst single sample: 1.3 µg/L | 8/20 | SYR4 | 2012–2019 |
| Arsenic | 6.95 µg/L 70% of the EPA limit 10 µg/L
worst single sample: 8 µg/L | 8/20 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1325 µg/L 13% of the EPA limit 10000 µg/L
worst single sample: 1500 µg/L | 8/9 | SYR4 | 2012–2015 |
| Selenium | 8.37 µg/L 17% of the EPA limit 50 µg/L
worst single sample: 9.9 µg/L | 7/20 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 6.74 µg/L No EPA limit set
worst single sample: 6.8 µg/L | 4/8 | SYR4 | 2015–2019 |
| Dichloroacetic Acid | 3.985 µg/L No EPA limit set
worst single sample: 4 µg/L | 4/8 | SYR4 | 2015–2019 |
| Cadmium | 0.1162 µg/L 2.3% of the EPA limit 5 µg/L
worst single sample: 0.1200 µg/L | 3/20 | SYR4 | 2012–2019 |
| Mercury | 0.0397 µg/L 2% of the EPA limit 2 µg/L
worst single sample: 0.0410 µg/L | 3/20 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 2.18 µg/L No EPA limit set
worst single sample: 2.2 µg/L | 3/8 | SYR4 | 2015–2019 |
| Thallium, Total | 0.0771 µg/L 3.9% of the EPA limit 2 µg/L
worst single sample: 0.0800 µg/L | 2/20 | SYR4 | 2012–2019 |
| Chromium | 0.2700 µg/L 0.3% of the EPA limit 100 µg/L | 1/20 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Adipate | 1.4 µg/L 0.4% of the EPA limit 400 µg/L | 1/36 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) Phthalate | 1.3 µg/L 22% of the EPA limit 6 µg/L | 1/36 | SYR4 | 2012–2019 |
77 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Arapahoe Cnty Wwwa
Is Arapahoe Cnty Wwwa tap water safe to drink?
EPA monitoring detected 32 contaminants in Arapahoe Cnty Wwwa's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Arapahoe Cnty Wwwa's water?
EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Nitrate, Lead, Barium, and others. The full list with the level and data source for each is above.
How many people does Arapahoe Cnty Wwwa serve?
Arapahoe Cnty Wwwa reports serving 31,000 people in Colorado, per its EPA record.
Has Arapahoe Cnty Wwwa had any water quality violations?
The EPA has 518 violations on file for Arapahoe Cnty Wwwa, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.