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.
2
health-based violations
26
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2004-11-01 → 2004-11-30 |
| MCL | Health-based | Resolved | 2004-11-01 → 2004-11-30 |
| MON | Monitoring | Resolved | 2020-04-01 → 2020-04-30 |
| MON | Monitoring | Resolved | 2020-04-01 → 2020-04-30 |
| MON | Monitoring | Resolved | 2020-03-01 → 2020-03-31 |
| MON | Monitoring | Resolved | 2020-03-01 → 2020-03-31 |
| MON | Monitoring | Resolved | 2020-02-01 → 2020-02-29 |
| MON | Monitoring | Resolved | 2020-02-01 → 2020-02-29 |
| MON | Monitoring | Resolved | 2020-01-01 → 2020-01-31 |
| MON | Monitoring | Resolved | 2020-01-01 → 2020-01-31 |
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 |
|---|---|---|---|---|
| Bromodichloromethane | 18 µg/L No EPA limit set
worst single sample: 39.4 µg/L | 1299/1432 | SYR4 | 2012–2019 |
| Dibromochloromethane | 26.31 µg/L No EPA limit set
worst single sample: 39.9 µg/L | 1299/1425 | SYR4 | 2012–2019 |
| TTHM | 64.63 µg/L 81% of the EPA limit 80 µg/L
worst single sample: 126 µg/L | 1295/1420 | SYR4 | 2012–2019 |
| Chloroform | 15.2 µg/L No EPA limit set
worst single sample: 53 µg/L | 1291/1431 | SYR4 | 2012–2019 |
| Bromoform | 23.87 µg/L No EPA limit set
worst single sample: 38.5 µg/L | 1287/1429 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 16.8 µg/L 28% of the EPA limit 60 µg/L
worst single sample: 37.7 µg/L | 1090/1105 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 8.929 µg/L No EPA limit set
worst single sample: 23.6 µg/L | 1082/1109 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 11.36 µg/L No EPA limit set
worst single sample: 14.8 µg/L | 1029/1109 | SYR4 | 2012–2019 |
| Fluoride | 760 µg/L 19% of the EPA limit 4000 µg/L
worst single sample: 1020 µg/L | 765/765 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 4.5775 µg/L No EPA limit set
worst single sample: 11.6 µg/L | 626/1110 | SYR4 | 2012–2019 |
| Arsenic | 3.3 µg/L 33% of the EPA limit 10 µg/L
worst single sample: 7.34 µg/L | 108/431 | SYR4 | 2012–2019 |
| Barium | 135 µg/L 6.8% of the EPA limit 2000 µg/L
worst single sample: 146 µg/L | 89/348 | SYR4 | 2012–2019 |
| Chlorite | 452.8 µg/L 45% of the EPA limit 1000 µg/L
worst single sample: 1000 µg/L | 83/83 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 4.335 µg/L 87% of the EPA limit 5 µg/L
worst single sample: 4.47 µg/L | 71/402 | SYR4 | 2012–2019 |
| Trichloroethylene | 4.5 µg/L 90% of the EPA limit 5 µg/L
worst single sample: 5.05 µg/L | 71/402 | SYR4 | 2012–2019 |
| Nitrate | 2768.5 µg/L 28% of the EPA limit 10000 µg/L
worst single sample: 3435.2 µg/L | 70/1808 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 3.065 µg/L No EPA limit set
worst single sample: 6.41 µg/L | 50/1113 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 45/45 | LCR | 2023 |
| Gross Beta Particle Activity | 24.95 pCi/L No EPA limit set
worst single sample: 30.7 pCi/L | 31/38 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 0.9525 µg/L 1.4% of the EPA limit 70 µg/L
worst single sample: 1.01 µg/L | 27/402 | SYR4 | 2012–2019 |
| Combined Uranium | 71.52 µg/L 238% of the EPA limit, at the 95th percentile of samples — 30 µg/L
worst single sample: 73.01 µg/L | 23/27 | SYR4 | 2012–2019 |
| Lithium | 65 µg/L No EPA limit set | 15/16 | UCMR-5 | 2023 |
| Bromate | 9.744 µg/L 97% of the EPA limit 10 µg/L
worst single sample: 10.2 µg/L | 13/355 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 2.5125 µg/L No EPA limit set
worst single sample: 2.52 µg/L | 4/1113 | SYR4 | 2012–2019 |
| Selenium | 6.7985 µg/L 14% of the EPA limit 50 µg/L
worst single sample: 6.82 µg/L | 2/347 | SYR4 | 2012–2019 |
| Mercury | 1.9 µg/L 95% of the EPA limit 2 µg/L | 1/337 | SYR4 | 2012–2019 |
87 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-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, TotalO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about San Diego, City of
Is San Diego, City of tap water safe to drink?
EPA monitoring detected 26 contaminants in San Diego, City of'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 San Diego, City of's water?
EPA monitoring detected Bromodichloromethane, Dibromochloromethane, TTHM, Chloroform, Bromoform, and others. The full list with the level and data source for each is above.
How many people does San Diego, City of serve?
San Diego, City of reports serving 1,385,379 people in California, per its EPA record.
Has San Diego, City of had any water quality violations?
The EPA has 26 violations on file for San Diego, City of, of which 2 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.