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Code §93.8c Table 5 (water quality criteria for toxic substances) and §93.7 Table 3 (specific water quality criteria) — Pennsylvania","issuer":"Commonwealth of Pennsylvania, Environmental Quality Board (Department of Environmental Protection)","edition":"Pennsylvania Code as served 2026-10-09: §93.8c amended December 19, 2025, effective December 20, 2025, 55 Pa.B. 8596; §93.7 rows name their own page","source_url":"https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/025/chapter93/s93.8c.html","source_sha256":"9f8f9a0d4da400c55be6373f6a6482b24c4fab5c9a4d0c445f3f55c33a799beb","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"25 Pa. Code §93.8c Table 5 (criteria continuous concentration (CCC))","page":null,"quote":"D XYLENE 1330207 210 1100 1000 2 Acronyms and Notes to Table 5 1 Indicates a human health criterion based on a cancer potency factor and cancer risk level at 1 x 10 -6 (CRL); where no cancer potency factor exists, the human health criterion is based on threshold toxicity data plus additional safety factors. 2 Indicates a human health criterion based on threshold effect (H). 3 Indicates dissolved aquatic life criterion; others are total recoverable. Each listed dissolved criterion in Table 5 is equal to the corresponding total recoverable criterion before rounding (from the EPA National Ambient Water Quality Criteria Documents) multiplied by the conversion factor (from the Conversion Factors Table); a criterion that is expressed as a hardness (H)-based equation is shown in Table 5 as the conversion factor (listed) multiplied by the hardness criterion equation; an example criterion at hardness=100mg/L is included. 4 Indicates duration for aquatic life criteria; CMC = instantaneous; CCC = 24-hour average. 5 Indicates human health criterion is based on the exposure inputs of 2 liters per day of drinking water and consumption of 17.5 grams of fish per day, for protection of a 70 Kg person. CAS—Chemical Abstract Service number D—DEP developed criteria E—EPA developed criteria ln[H]—Natural Logarithm of the Hardness of stream as mg/l CaCO 3 µg/L—Micrograms per liter N/A—Criterion not developed PP NO—Priority Pollutant Number Authority The provisions of this § 93.8c amended under sections 5(b)(1) and 402 of The Clean Streams Law (35 P.S. § § 691.5(b)(1) and 691.402); and section 1920-A of The Administrative Code of 1929 (71 P.S. § 510-20). Source The provisions of this § 93.8c adopted May 15, 2009, effective May 16, 2009, 39 Pa.B. 2523; amended July 19, 2013, effective July 20, 2013, 43 Pa.B. 4080; amended July 10, 2020, effective July 11, 2020, 50 Pa.B. 3426; amended December 19, 2025, effective December 20, 2025, 55 Pa.B. 8596. Immediately preceding text appears at serial pages (401849) to (401860) and (424413) to (424414). Cross References This section cited in 25 Pa. Code § 16.24 (relating to metals criteria); 25 Pa. Code § 16.51 (relating to human health and aquatic life criteria); 25 Pa. Code § 16.61 (relating to special provisions for the Great Lakes system); and 25 Pa. Code § 93.8d (relating to development of site-specific water quality criteria). No part of the information on this site may be reproduced for profit or sold for profit. This material has been drawn directly from the official Pennsylvania Code full text database. Due to the limitations of HTML or differences in display capabilities of different browsers, this version may differ slightly from the official printed version. Top Bottom No part of the information on this site may be reproduced forprofit or sold for profit. Please direct comments or questions to webmaster@PaBulletin.com Accessibility Privacy Disclaimer Style Manual Code Publication Schedule Bulletin Publication Schedule Accessibility | Privacy | Disclaimer | Style Manual | Code Publication Schedule | Bulletin Publication Schedule"}},{"id":"a41737e12f626e98","parameter":"XYLENE","value":"1100","value_num":1100,"unit":"µg/L","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1330-20-7","place":["US-PA"],"conditions":[],"cite":{"instrument":"us_pa_wqs","title":"25 Pa. Code §93.8c Table 5 (water quality criteria for toxic substances) and §93.7 Table 3 (specific water quality criteria) — Pennsylvania","issuer":"Commonwealth of Pennsylvania, Environmental Quality Board (Department of Environmental Protection)","edition":"Pennsylvania Code as served 2026-10-09: §93.8c amended December 19, 2025, effective December 20, 2025, 55 Pa.B. 8596; §93.7 rows name their own page","source_url":"https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/025/chapter93/s93.8c.html","source_sha256":"9f8f9a0d4da400c55be6373f6a6482b24c4fab5c9a4d0c445f3f55c33a799beb","fetched_at":"2026-10-09","source_status":{"checked":"2026-10-15","status":"not verified"},"section":"25 Pa. Code §93.8c Table 5 (criteria maximum concentration (CMC))","page":null,"quote":"D XYLENE 1330207 210 1100 1000 2 Acronyms and Notes to Table 5 1 Indicates a human health criterion based on a cancer potency factor and cancer risk level at 1 x 10 -6 (CRL); where no cancer potency factor exists, the human health criterion is based on threshold toxicity data plus additional safety factors. 2 Indicates a human health criterion based on threshold effect (H). 3 Indicates dissolved aquatic life criterion; others are total recoverable. Each listed dissolved criterion in Table 5 is equal to the corresponding total recoverable criterion before rounding (from the EPA National Ambient Water Quality Criteria Documents) multiplied by the conversion factor (from the Conversion Factors Table); a criterion that is expressed as a hardness (H)-based equation is shown in Table 5 as the conversion factor (listed) multiplied by the hardness criterion equation; an example criterion at hardness=100mg/L is included. 4 Indicates duration for aquatic life criteria; CMC = instantaneous; CCC = 24-hour average. 5 Indicates human health criterion is based on the exposure inputs of 2 liters per day of drinking water and consumption of 17.5 grams of fish per day, for protection of a 70 Kg person. CAS—Chemical Abstract Service number D—DEP developed criteria E—EPA developed criteria ln[H]—Natural Logarithm of the Hardness of stream as mg/l CaCO 3 µg/L—Micrograms per liter N/A—Criterion not developed PP NO—Priority Pollutant Number Authority The provisions of this § 93.8c amended under sections 5(b)(1) and 402 of The Clean Streams Law (35 P.S. § § 691.5(b)(1) and 691.402); and section 1920-A of The Administrative Code of 1929 (71 P.S. § 510-20). Source The provisions of this § 93.8c adopted May 15, 2009, effective May 16, 2009, 39 Pa.B. 2523; amended July 19, 2013, effective July 20, 2013, 43 Pa.B. 4080; amended July 10, 2020, effective July 11, 2020, 50 Pa.B. 3426; amended December 19, 2025, effective December 20, 2025, 55 Pa.B. 8596. Immediately preceding text appears at serial pages (401849) to (401860) and (424413) to (424414). Cross References This section cited in 25 Pa. Code § 16.24 (relating to metals criteria); 25 Pa. Code § 16.51 (relating to human health and aquatic life criteria); 25 Pa. Code § 16.61 (relating to special provisions for the Great Lakes system); and 25 Pa. Code § 93.8d (relating to development of site-specific water quality criteria). No part of the information on this site may be reproduced for profit or sold for profit. This material has been drawn directly from the official Pennsylvania Code full text database. Due to the limitations of HTML or differences in display capabilities of different browsers, this version may differ slightly from the official printed version. Top Bottom No part of the information on this site may be reproduced forprofit or sold for profit. Please direct comments or questions to webmaster@PaBulletin.com Accessibility Privacy Disclaimer Style Manual Code Publication Schedule Bulletin Publication Schedule Accessibility | Privacy | Disclaimer | Style Manual | Code Publication Schedule | Bulletin Publication Schedule"}},{"id":"35dcf6ba46db63de","parameter":"XYLENE","value":"1000","value_num":1000,"unit":"µg/L","direction":"max","kind":"guideline","medium":"surface_water","level":"regional","parameter_key":"cas:1330-20-7","place":["US-PA"],"conditions":[],"cite":{"instrument":"us_pa_wqs","title":"25 Pa. 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Code §93.8c Table 5 (human health)","page":null,"quote":"D XYLENE 1330207 210 1100 1000 2 Acronyms and Notes to Table 5 1 Indicates a human health criterion based on a cancer potency factor and cancer risk level at 1 x 10 -6 (CRL); where no cancer potency factor exists, the human health criterion is based on threshold toxicity data plus additional safety factors. 2 Indicates a human health criterion based on threshold effect (H). 3 Indicates dissolved aquatic life criterion; others are total recoverable. Each listed dissolved criterion in Table 5 is equal to the corresponding total recoverable criterion before rounding (from the EPA National Ambient Water Quality Criteria Documents) multiplied by the conversion factor (from the Conversion Factors Table); a criterion that is expressed as a hardness (H)-based equation is shown in Table 5 as the conversion factor (listed) multiplied by the hardness criterion equation; an example criterion at hardness=100mg/L is included. 4 Indicates duration for aquatic life criteria; CMC = instantaneous; CCC = 24-hour average. 5 Indicates human health criterion is based on the exposure inputs of 2 liters per day of drinking water and consumption of 17.5 grams of fish per day, for protection of a 70 Kg person. CAS—Chemical Abstract Service number D—DEP developed criteria E—EPA developed criteria ln[H]—Natural Logarithm of the Hardness of stream as mg/l CaCO 3 µg/L—Micrograms per liter N/A—Criterion not developed PP NO—Priority Pollutant Number Authority The provisions of this § 93.8c amended under sections 5(b)(1) and 402 of The Clean Streams Law (35 P.S. § § 691.5(b)(1) and 691.402); and section 1920-A of The Administrative Code of 1929 (71 P.S. § 510-20). Source The provisions of this § 93.8c adopted May 15, 2009, effective May 16, 2009, 39 Pa.B. 2523; amended July 19, 2013, effective July 20, 2013, 43 Pa.B. 4080; amended July 10, 2020, effective July 11, 2020, 50 Pa.B. 3426; amended December 19, 2025, effective December 20, 2025, 55 Pa.B. 8596. Immediately preceding text appears at serial pages (401849) to (401860) and (424413) to (424414). Cross References This section cited in 25 Pa. Code § 16.24 (relating to metals criteria); 25 Pa. Code § 16.51 (relating to human health and aquatic life criteria); 25 Pa. Code § 16.61 (relating to special provisions for the Great Lakes system); and 25 Pa. Code § 93.8d (relating to development of site-specific water quality criteria). No part of the information on this site may be reproduced for profit or sold for profit. This material has been drawn directly from the official Pennsylvania Code full text database. Due to the limitations of HTML or differences in display capabilities of different browsers, this version may differ slightly from the official printed version. Top Bottom No part of the information on this site may be reproduced forprofit or sold for profit. Please direct comments or questions to webmaster@PaBulletin.com Accessibility Privacy Disclaimer Style Manual Code Publication Schedule Bulletin Publication Schedule Accessibility | Privacy | Disclaimer | Style Manual | Code Publication Schedule | Bulletin Publication Schedule"}},{"id":"8ec0a7943971ae79","parameter":"Xylenes-mixed isomers (sum of o-, m-, and p-xylene concentrations)","value":"0.32","value_num":0.32,"unit":"mg/L","statistic":"composite","direction":"max","kind":"limit","medium":"product","level":"national","parameter_key":"cas:1330-20-7","place":["US"],"conditions":["(a) Table UTS identifies the hazardous constituents, along with the nonwastewater and wastewater treatment standard levels, that are used to regulate most prohibited hazardous wastes with numerical limits. For determining compliance with treatment standards for underlying hazardous constituents as defined in § 268.2(i), these treatment standards may not be exceeded. 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