San Francisco County, California
SDWIS compliance plate
Sheet CA075 · San Francisco County 8 sys · 77 viol · #53/3254
VIOL-SEVERE · HEALTH-HIGH · RANK-TOP · PHOTO-FINISH · PFAS-MID · SRC-SW · SYS-TINY · BOOK-FULL
- VIOL-SEVERE 87.5% flagged
- HEALTH-HIGH 64.9% health
- RANK-TOP #53/3254
- PHOTO-FINISH ±0.1 pp
- PFAS-MID 25.0% detect
- SRC-SW SW lead 100%
- SYS-TINY 8 systems
- BOOK-FULL 7/7 fields
Nearest flagged-rate peer: Tehama County ( -0.1 pp flagged-rate)
According to EPA SDWIS county population served used on /counties, San Francisco County ranks #53 of 3,254 counties by people served, and #10 of 58 counties in California. See methodology · corpus placement.
San Francisco County standing, lower-flagged corpus third
Flagged-system rate 87.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 64.9% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #53 of 3,254 · #10 of 58 in California.
Flagged-rate neighbourhood around San Francisco County
Lowest/highest poles plus in-state counties nearest San Francisco County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.
Water Systems
| System Name | Population | Violations | PFAS |
|---|---|---|---|
| Sfpuc City Distribution Division | 848,019 | 0 | Clean |
| San Francisco International Airport | 183,386 | 11 | Clean |
| Treasure Island | 3,864 | 6 | - |
| Presidio of San Francisco | 3,500 | 14 | Detected |
| San Francisco Regional Water System | 600 | 16 | Clean |
| Hhw&p-O'Shaughnessy Dam Cpd-Sfpuc | 495 | 13 | - |
| Hhw&p Moccasin Compound-Sfpuc | 410 | 6 | - |
| Hhw&p-Early Intake Cpd-Sfpuc | 30 | 11 | - |
Compare beyond California
Lower-flagged peers for San Francisco County
Cross-state counties nearest San Francisco County on flagged-system share (87.5%) and cumulative violation count (77). In-state neighbours stay on the compliance plate above.
Similar flagged-system rate
Nearest cross-state counties by % of SDWIS systems with at least one violation on record.
Similar violation load
Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).
Read our methodology · Check your water system - how this data is sourced, computed, and verified.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.