San Mateo County, CA: 17 findings, 4 at a watch level and 13 noted

17 findings fired for San Mateo County, CA this run, against a typical home value of $1,579,058 in September 2026 and covered employment of 413,139 in 2026 Q1. 5 further findings are not listed here.

This is the water & ecology lens: Biologists, hydrologists, water utilities, conservation It keeps the findings whose subject matches that interest and drops the rest, so it is a subset of the full brief and never a different set of numbers. The full brief is the canonical version of this page.

12 findings #

currentretrieved 2026-10-20

  1. watchSan Mateo County, CA's price-to-rent ratio of 33.0 ranks 9th of 1,358 US counties, a watch level here: price-to-rent in the top tenth of US counties (position among the counties that published both ZHVI and ZORI this month; not an official level). The previous published period is not in this table, so this is a standing level rather than a change.

    Period 2026-09.
    Show the arithmetic
    • test: priceToRent percentile = 99.41046425939572 >= 90
    • typical home value / (typical rent × 12); Zillow ZHVI over ZORI, same month

    position among the counties that published both ZHVI and ZORI this month; not an official level

  2. watchSan Mateo County, CA's price-to-rent ratio is 33.0, a watch level here: typical home value worth 25 or more years of typical rent (typical home value / (typical rent × 12), Zillow ZHVI over ZORI, same month; convention chosen for this dashboard, not an official level). The previous published period is not in this table, so this is a standing level rather than a change.

    Period 2026-09.
    Show the arithmetic
    • test: priceToRent = 32.95186192872027 >= 25
    • typical home value / (typical rent × 12); Zillow ZHVI over ZORI, same month

    typical home value / (typical rent × 12), Zillow ZHVI over ZORI, same month; convention chosen for this dashboard, not an official level

  3. watchSan Mateo County, CA's typical asking rent is +11.2% against a year earlier, a watch level here: typical asking rent at least 8 percent above a year ago (arithmetic on Zillow ZORI; convention chosen for this dashboard, not an official level). The previous published period is not in this table, so this is a standing level rather than a change.

    Period 2026-09.
    Show the arithmetic
    • test: rent.yoyPct = 11.245753962903875 >= 8

    arithmetic on Zillow ZORI; convention chosen for this dashboard, not an official level

  4. watchSan Mateo County, CA's years of wages of 6.5 scores 85 on the 0-to-100 scale across US counties but 28 across California counties, a gap of 56 points.

    Period 2026-09.
    Show the arithmetic
    • 56 = |85 across US counties - 28 across California counties|
    • typical home value / (average weekly wage × 52); one average covered job, not a household

    position among the entities that published this metric this period; not an official level

  5. noteSan Mateo County, CA's typical asking rent rose 1.2% from $3,946 in August 2026 to $3,993 in September 2026, on Zillow ZORI.

    Period 2026-09.
    Show the arithmetic
    • +1.2% = (3993.3459781045035 - 3946.333812555109) / 3946.333812555109 × 100
    • 3993.3459781045035 = Zillow ZORI, 2026-09
    • 3946.333812555109 = Zillow ZORI, 2026-08

  6. noteSan Mateo County, CA's typical home value rose 0.8% from $1,566,542 in August 2026 to $1,579,058 in September 2026, on Zillow ZHVI.

    Period 2026-09.
    Show the arithmetic
    • +0.8% = (1579058.22364932 - 1566542.4441563047) / 1566542.4441563047 × 100
    • 1579058.22364932 = Zillow ZHVI, 2026-09
    • 1566542.4441563047 = Zillow ZHVI, 2026-08

  7. noteSan Mateo County, CA's typical home value of $1,579,058 ranks 1st of 58 California counties, against a median of $494,569.

    Period 2026-09.
    Show the arithmetic
    • 100 on the 0-to-100 scale across 58 California counties that published home.latest

    position among the entities that published this metric this period; not an official level

  8. noteSan Mateo County, CA's typical home value of $1,579,058 ranks 1st of 5 counties in the San Francisco-Oakland-Fremont metro, against a median of $1,441,170.

    Period 2026-09.
    Show the arithmetic
    • 100 on the 0-to-100 scale across 5 counties in the San Francisco-Oakland-Fremont metro that published home.latest

    position among the entities that published this metric this period; not an official level

  9. noteSan Mateo County, CA's momentum index of 0.57 ranks 1st of 5 counties in the San Francisco-Oakland-Fremont metro, against a median of 0.29.

    Period 2026-09.
    Show the arithmetic
    • 100 on the 0-to-100 scale across 5 counties in the San Francisco-Oakland-Fremont metro that published momentum
    • momentum = Σ wᵢ · clip(changeᵢ / scaleᵢ, −1, 1) / Σ wᵢ over the terms present; weights and scales: home value 1-yr change 0.3 (±10%), rent 1-yr change 0.15 (±10%), jobs over-the-year change 0.3 (±3%), avg weekly wage over-the-year change 0.25 (±6%)

    position among the entities that published this metric this period; not an official level

  10. noteSan Mateo County, CA's years of wages of 6.5 ranks 5th of 5 counties in the San Francisco-Oakland-Fremont metro, against a median of 8.2.

    Period 2026-09.
    Show the arithmetic
    • 0 on the 0-to-100 scale across 5 counties in the San Francisco-Oakland-Fremont metro that published yearsOfWages
    • typical home value / (average weekly wage × 52); one average covered job, not a household

    position among the entities that published this metric this period; not an official level

  11. noteSan Mateo County, CA's typical home value of $1,579,058 ranks 5th of 3,063 US counties, against a median of $230,451.

    Period 2026-09.
    Show the arithmetic
    • 100 on the 0-to-100 scale across 3063 US counties that published home.latest

    position among the entities that published this metric this period; not an official level

  12. noteSan Mateo County, CA's typical asking rent of $3,993 ranks 6th of 1,358 US counties, against a median of $1,506.

    Period 2026-09.
    Show the arithmetic
    • 100 on the 0-to-100 scale across 1358 US counties that published rent.latest

    position among the entities that published this metric this period; not an official level

A lens narrows which numbers are shown, not which holes are admitted to: a withheld figure or a pending release survives every lens, because a gap is a fact about the place rather than about one reader's subject.

Subscribe to this lens #

currentretrieved 2026-10-20

The same narrowed findings as a feed.

Sources #

  • estimateZillow Home Value Index (ZHVI)Zillow Researchopen the source
    · retrieved 2026-10-20 · typical home value / (typical rent × 12); Zillow ZHVI over ZORI, same month
  • publishedZillow Observed Rent Index (ZORI)Zillow Researchopen the source
    County_zori_uc_sfrcondomfr_sm_month.csv · period 2026-09 · retrieved 2026-10-20
  • estimateQuarterly Census of Employment and WagesU.S. Bureau of Labor Statisticsopen the source
    · retrieved 2026-10-20 · typical home value / (average weekly wage × 52); one average covered job, not a household
  • publishedZillow Home Value Index (ZHVI)Zillow Researchopen the source
    County_zhvi_uc_sfrcondo_tier_0.33_0.67_sm_sa_month.csv · period 2026-09 · retrieved 2026-10-20
  • estimateZillow Home Value Index (ZHVI)Zillow Researchopen the source
    · retrieved 2026-10-20 · momentum = Σ wᵢ · clip(changeᵢ / scaleᵢ, −1, 1) / Σ wᵢ over the terms present; weights and scales: home value 1-yr change 0.3 (±10%), rent 1-yr change 0.15 (±10%), jobs over-the-year change 0.3 (±3%), avg weekly wage over-the-year change 0.25 (±6%)
  • estimateZillow Home Value Index (ZHVI)Zillow Researchopen the source
    · retrieved 2026-10-20 · month-over-month percent change = (newest month − previous month) / |previous month| × 100, from Zillow's own published month columns
  • publishedQuarterly Census of Employment and WagesU.S. Bureau of Labor Statisticsopen the source
    area 06081, all ownerships, all industries · period 2026-Q1 · retrieved 2026-10-20
  • estimateZillow Observed Rent Index (ZORI)Zillow Researchopen the source
    · retrieved 2026-10-20 · month-over-month percent change = (newest month − previous month) / |previous month| × 100, from Zillow's own published month columns

Citations

  • Zillow Research. Zillow Home Value Index (ZHVI). https://www.zillow.com/research/data/. accessed 2026-10-20. estimate computed by Embedding Atlas: typical home value / (typical rent × 12); Zillow ZHVI over ZORI, same month.
  • Zillow Research. Zillow Observed Rent Index (ZORI). series County_zori_uc_sfrcondomfr_sm_month.csv. period 2026-09. https://files.zillowstatic.com/research/public_csvs/zori/County_zori_uc_sfrcondomfr_sm_month.csv. accessed 2026-10-20.
  • U.S. Bureau of Labor Statistics. Quarterly Census of Employment and Wages. https://www.bls.gov/cew/. accessed 2026-10-20. estimate computed by Embedding Atlas: typical home value / (average weekly wage × 52); one average covered job, not a household.
  • Zillow Research. Zillow Home Value Index (ZHVI). series County_zhvi_uc_sfrcondo_tier_0.33_0.67_sm_sa_month.csv. period 2026-09. https://files.zillowstatic.com/research/public_csvs/zhvi/County_zhvi_uc_sfrcondo_tier_0.33_0.67_sm_sa_month.csv. accessed 2026-10-20.
  • Zillow Research. Zillow Home Value Index (ZHVI). https://www.zillow.com/research/data/. accessed 2026-10-20. estimate computed by Embedding Atlas: momentum = Σ wᵢ · clip(changeᵢ / scaleᵢ, −1, 1) / Σ wᵢ over the terms present; weights and scales: home value 1-yr change 0.3 (±10%), rent 1-yr change 0.15 (±10%), jobs over-the-year change 0.3 (±3%), avg weekly wage over-the-year change 0.25 (±6%).
  • Zillow Research. Zillow Home Value Index (ZHVI). https://www.zillow.com/research/data/. accessed 2026-10-20. estimate computed by Embedding Atlas: month-over-month percent change = (newest month − previous month) / |previous month| × 100, from Zillow's own published month columns.
  • U.S. Bureau of Labor Statistics. Quarterly Census of Employment and Wages. series area 06081, all ownerships, all industries. period 2026-Q1. https://data.bls.gov/cew/data/api/2026/1/area/06081.csv. accessed 2026-10-20.
  • Zillow Research. Zillow Observed Rent Index (ZORI). https://www.zillow.com/research/data/. accessed 2026-10-20. estimate computed by Embedding Atlas: month-over-month percent change = (newest month − previous month) / |previous month| × 100, from Zillow's own published month columns.

What these numbers are not

  • The newest BLS QCEW file carries no year-earlier level, only the over-the-year percent change BLS publishes itself. Every employment and wage comparison here states that published change; none of them is a move from one level to another, because the two levels are not both in the file.
  • A percentile here is a min-max scaling of average rank across the entities that published the metric this period: the smallest published value scores 0 and the largest scores 100. It is not the share of entities below the value, and entities that did not publish the metric are counted in neither the rank nor its denominator.
  • The named indicators shown beside this brief are national or basin-level series, not measurements of San Mateo County, CA; none is at a watch or alert level. They are context.
  • The occupation mix is the 41860 metro area's, from the bundled BLS OEWS release: OEWS does not publish a county table.
  • Water rows are everything within 75 km of this place's internal point (150 km for reservoirs), not everything inside its boundary: lib/water searches discs, and every row prints its own distance.
  • Server report: satellite turbidity is only computed in a browser, so that term is absent here.
  • USGS gauges did not answer.
  • USGS wells did not answer.
  • Stress uses 1 of 4 terms (drought); missing terms are left out, not assumed.
  • Groundwater has no trend term: one latest level cannot say whether an aquifer is being drawn down.
  • Obligations are what agencies committed in FY2026 by place of performance: not outlays, and not the recipient's own location.
  • FY2026 closed 20 days ago; agencies report with up to a 45-day lag, so totals are still filling in.
  • Positions are ZIP or city centroids of the registered business address, not building footprints.
  • Sector and ETF names are a stated convention (lib/companies/sectors.ts), not classification by MSCI/S&P and not advice.
  • The indicator block is the NATIONAL set, filtered only by lens. None of these series is keyed to this place: they are United States, gauge, single-state or port series and they are shown as context, not as this place's own readings.

Page assembled 2026-10-20T08:00:39.351Z. Place identity tables pulled 2026-10-01.