{"id":93639,"date":"2026-10-17T08:11:21","date_gmt":"2026-10-17T00:11:21","guid":{"rendered":"https:\/\/sgbuzz.com\/?p=93639"},"modified":"2026-10-17T08:11:21","modified_gmt":"2026-10-17T00:11:21","slug":"haze-in-singapore-psi-back-to-unhealthy-range-pm2-5-remains-elevated-in-all-regions","status":"publish","type":"post","link":"https:\/\/sgbuzz.com\/?p=93639","title":{"rendered":"Haze in Singapore: PSI back to \u2018unhealthy\u2019 range, PM2.5 remains \u2018elevated\u2019 in all regions"},"content":{"rendered":"<p><br \/>\n<\/p>\n<div>\n<p class=\"text-primary article-summary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">SINGAPORE &#8211; The hazy conditions continued in the morning of Oct 17 even as the 24-hour PSI in central Singapore dipped back to the \u201cunhealthy\u201d band after staying in the <a href=\"https:\/\/www.straitstimes.com\/singapore\/haze-in-spore-air-quality-worsens-overnight-as-psi-hits-very-unhealthy-range-in-central-region?ref=inline-article\" rel=\"noopener\" class=\"gap-x-04 items-center inline text-primary-60 select-auto\" aria-label=\"link\" target=\"_blank\" data-testid=\"custom-link\"><span class=\"inline font-tertiary-body-baseline-regular\" data-testid=\"typography-test-id\">\u201cvery unhealthy\u201d range the day before.<\/span><\/a><\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">At 7am, the 24-hour PSI was in the <!-- -->\u201cunhealthy\u201d<!-- --> range in all regions:<!-- --> central (191), north (144), south (161), east (175), west (181).<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">The central region was worst hit on Oct 16 when the 24-hour PSI there registered \u201cvery unhealthy\u201d readings throughout the day,<!-- --> peaking at a season high of <!-- -->229 from 3pm to 4pm<!-- -->, <!-- -->till the early hours of Oct 17.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">Air quality is considered \u201cunhealthy\u201d when the PSI \u2013 a 24-hour rolling average of six key air pollutants \u2013 is in the range of 101 to 200, and \u201cvery unhealthy\u201d when it is in the range of 201 to 300.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">Meanwhile, the hourly PM2.5 readings \u2013 measured in micrograms per cubic metre and used as a gauge for current air quality \u2013\u00a0remained in the \u201c<!-- -->elevated<!-- -->\u201d range across all regions at <!-- -->7am: central (108), north (83), south (75), east (119), west (97).<\/p>\n<p><iframe class=\"responsive-iframe-base st_visuals st_visuals-embed\" title=\"st_visuals embed\" scrolling=\"no\" src=\"https:\/\/www.straitstimes.com\/multimedia\/graphics\/2026\/08\/singapore-haze-widget\/index.html\" allowfullscreen=\"\" allow=\"accelerometer;falseclipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share;\" loading=\"eager\" data-testid=\"responsiveIframe\"><\/iframe><\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">PM2.5 scores from 0 to 55 represent normal values, those between 56 and 150 indicate an elevated concentration of fine particles, while readings between 151 and 250 are considered high and scores above 251 are classified as very high.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">The highest PM2.5 reading this haze season was recorded at 3pm on Oct 14 in the western part of the island at 288.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">Singapore is in its 13th consecutive day of unhealthy air since Oct 5 \u2013 the longest continuous stretch of poor air quality the country has endured since the 2015 haze crisis. That year, bad air lasted 14 days from Sept 23 to Oct 7.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">In its daily haze advisory on the evening of Oct 16, the National Environment Agency (NEA) said the PSI forecast for Oct 17 could be <!-- -->between 150 and 230<!-- -->, putting it in the range of \u201cunhealthy\u201d to \u201cvery unhealthy\u201d.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">Some showers are expected over Singapore and the surrounding region, including over parts of Kalimantan, on Oct 17.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">\u201cWith the winds forecast to shift to blow from the south-east or south-south-east, the transport of smoke haze from Kalimantan to Singapore may be reduced. However, some smoke haze from Sumatra may drift towards Singapore,\u201d the agency said.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">Similarly, showers are also forecast over Singapore and parts of Kalimantan on Oct 18 and 19, it added.<\/p>\n<p class=\"text-primary font-tertiary-body-baseline-regular\" data-testid=\"article-paragraph-annotation-test-id\">It said that the winds are expected to gradually weaken and blow from the south-east or south, which could further decrease the movement of smoke haze from Kalimantan to Singapore.<\/p>\n<p><iframe loading=\"lazy\" title=\"When should Singaporeans start wearing N95 masks because of the haze?\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/S9J9NcVJ6zc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<\/div>\n<p><br \/>\n<center><br \/>\n<br \/><a href=\"https:\/\/www.straitstimes.com\/singapore\/haze-in-singapore-psi-back-to-unhealthy-range-pm2-5-remains-elevated-in-all-regions\" target=\"_blank\" rel=\"noopener\">Read Full Article At Source <\/a><br \/>\n<center\/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>SINGAPORE &#8211; The hazy conditions continued in the morning of Oct 17 even as the 24-hour PSI in central Singapore dipped back to the \u201cunhealthy\u201d&#8230;<\/p>\n","protected":false},"author":1,"featured_media":93640,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[2611],"tags":[],"class_list":["post-93639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-buzz-headlines","wpcat-2611-id"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/sgbuzz.com\/index.php?rest_route=\/wp\/v2\/posts\/93639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sgbuzz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sgbuzz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sgbuzz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sgbuzz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=93639"}],"version-history":[{"count":0,"href":"https:\/\/sgbuzz.com\/index.php?rest_route=\/wp\/v2\/posts\/93639\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sgbuzz.com\/index.php?rest_route=\/wp\/v2\/media\/93640"}],"wp:attachment":[{"href":"https:\/\/sgbuzz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=93639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sgbuzz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=93639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sgbuzz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=93639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}