Compliance record
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 |
|---|---|---|---|---|
| Nitrate | 19210 µg/L 192% of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 22374 µg/L | 3240/3240 | SYR4 | 2012–2019 |
| Fluoride | 600 µg/L 15% of the EPA limit 4000 µg/L
worst single sample: 700 µg/L | 109/127 | SYR4 | 2012–2019 |
| Chromium | 3.315 µg/L 3.3% of the EPA limit 100 µg/L
worst single sample: 9 µg/L | 98/139 | SYR4 | 2012–2019 |
| Bromoform | 2.52 µg/L No EPA limit set
worst single sample: 3.4 µg/L | 37/48 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.2 µg/L No EPA limit set
worst single sample: 2.9 µg/L | 34/47 | SYR4 | 2012–2019 |
| TTHM | 5.55 µg/L 6.9% of the EPA limit 80 µg/L
worst single sample: 7.8 µg/L | 31/32 | SYR4 | 2012–2019 |
| Barium | 59 µg/L 2.9% of the EPA limit 2000 µg/L
worst single sample: 63 µg/L | 30/127 | SYR4 | 2012–2019 |
| Combined Uranium | 24.4658 µg/L 82% of the EPA limit 30 µg/L
worst single sample: 29.055 µg/L | 24/24 | SYR4 | 2012–2019 |
| Bromodichloromethane | 1.2 µg/L No EPA limit set
worst single sample: 1.4 µg/L | 22/46 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0222 µg/L 11% of the EPA limit 0.2000 µg/L
worst single sample: 0.0230 µg/L | 9/75 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 4.925 µg/L No EPA limit set
worst single sample: 5.4 µg/L | 6/33 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 9.6 µg/L 16% of the EPA limit 60 µg/L
worst single sample: 11 µg/L | 6/33 | SYR4 | 2012–2019 |
| Arsenic | 2.2 µg/L 22% of the EPA limit 10 µg/L | 5/127 | SYR4 | 2012–2019 |
| Copper | 95.95 µg/L 7.4% of the EPA limit 1300 µg/L
worst single sample: 100 µg/L | 4/127 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 2.53 µg/L No EPA limit set
worst single sample: 2.6 µg/L | 2/33 | SYR4 | 2012–2019 |
| Chloroform | 0.5000 µg/L No EPA limit set | 1/46 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 4.3 µg/L No EPA limit set | 1/33 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 4.1 µg/L No EPA limit set | 1/33 | SYR4 | 2012–2019 |
| Selenium | 6.6 µg/L 13% of the EPA limit 50 µg/L | 1/127 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 0.5900 µg/L 12% of the EPA limit 5 µg/L | 1/92 | SYR4 | 2012–2019 |
58 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Western Mwd (Arlington)
Is Western Mwd (Arlington) tap water safe to drink?
EPA monitoring detected 20 contaminants in Western Mwd (Arlington)'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 Western Mwd (Arlington)'s water?
EPA monitoring detected Nitrate, Fluoride, Chromium, Bromoform, Dibromochloromethane, and others. The full list with the level and data source for each is above.
How many people does Western Mwd (Arlington) serve?
Western Mwd (Arlington) reports serving 0 people in California, per its EPA record.
Has Western Mwd (Arlington) had any water quality violations?
The EPA has no formal drinking-water violations on file for Western Mwd (Arlington).
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.