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 |
|---|---|---|---|---|
| Fluoride | 854.4 µg/L 21% of the EPA limit 4000 µg/L
worst single sample: 1450 µg/L | 357/361 | SYR4 | 2015–2019 |
| Gross Beta Particle Activity | 320 pCi/L No EPA limit set
worst single sample: 327 pCi/L | 21/61 | SYR4 | 2015–2019 |
| Combined Uranium | 4.54748 µg/L 15% of the EPA limit 30 µg/L
worst single sample: 4.7978 µg/L | 17/34 | SYR4 | 2015–2019 |
| Selenium | 1900.87 µg/L 3802% of the EPA limit, at the 95th percentile of samples — 50 µg/L
worst single sample: 2920 µg/L | 8/28 | SYR4 | 2015–2019 |
| Dichloromethane | 1.61 µg/L 32% of the EPA limit 5 µg/L
worst single sample: 1.7 µg/L | 7/36 | SYR4 | 2015–2019 |
| Arsenic | 332.624 µg/L 3326% of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 415 µg/L | 5/29 | SYR4 | 2015–2019 |
| Dibromoacetic Acid | 2.575 µg/L No EPA limit set
worst single sample: 2.8 µg/L | 4/200 | SYR4 | 2015–2019 |
| Monobromoacetic Acid | 1.595 µg/L No EPA limit set
worst single sample: 1.6 µg/L | 2/200 | SYR4 | 2015–2019 |
| TTHM | 16.0235 µg/L 20% of the EPA limit 80 µg/L
worst single sample: 16.8 µg/L | 2/219 | SYR4 | 2015–2019 |
| Beryllium, Total | 31 µg/L 775% of the EPA limit, at the 95th percentile of samples — 4 µg/L | 1/31 | SYR4 | 2015–2019 |
| Bromoform | 1.27 µg/L No EPA limit set | 1/219 | SYR4 | 2015–2019 |
| Chloroform | 16.8 µg/L No EPA limit set | 1/219 | SYR4 | 2015–2019 |
| Dichloroacetic Acid | 1.9 µg/L No EPA limit set | 1/200 | SYR4 | 2015–2019 |
| Lead | 974 µg/L 6493% of the EPA limit, at the 95th percentile of samples — 15 µg/L | 1/240 | SYR4 | 2015–2019 |
| Thallium, Total | 173 µg/L 8650% of the EPA limit, at the 95th percentile of samples — 2 µg/L | 1/28 | SYR4 | 2015–2019 |
| Total Haloacetic Acids (HAA5) | 4.7 µg/L 7.8% of the EPA limit 60 µg/L | 1/200 | SYR4 | 2015–2019 |
63 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBromodichloromethaneChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonochloroacetic AcidNitrateNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
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Frequently asked questions about Carlsbad Desalination Plant
Is Carlsbad Desalination Plant tap water safe to drink?
EPA monitoring detected 16 contaminants in Carlsbad Desalination Plant'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 Carlsbad Desalination Plant's water?
EPA monitoring detected Fluoride, Gross Beta Particle Activity, Combined Uranium, Selenium, Dichloromethane, and others. The full list with the level and data source for each is above.
How many people does Carlsbad Desalination Plant serve?
Carlsbad Desalination Plant reports serving 0 people in California, per its EPA record.
Has Carlsbad Desalination Plant had any water quality violations?
The EPA has no formal drinking-water violations on file for Carlsbad Desalination Plant.
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.